• WordNet 3.6
    • adj parallel being everywhere equidistant and not intersecting "parallel lines never converge","concentric circles are parallel","dancers in two parallel rows"
    • adj parallel of or relating to the simultaneous performance of multiple operations "parallel processing"
    • v parallel make or place parallel to something "They paralleled the ditch to the highway"
    • v parallel be parallel to "Their roles are paralleled by ours"
    • v parallel duplicate or match "The polished surface twinned his face and chest in reverse"
    • n parallel something having the property of being analogous to something else
    • n parallel an imaginary line around the Earth parallel to the equator
    • n parallel (mathematics) one of a set of parallel geometric figures (parallel lines or planes) "parallels never meet"
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: Babe Ruth was able to throw two baseballs in such a way that the balls remained parallel to each other all the way from his hand to the catcher's glove. Ruth was famous for this stunt and would demonstrate it on request.
    • Parallel (Print) A character consisting of two parallel vertical lines (thus, ‖) used in the text to direct attention to a similarly marked note in the margin or at the foot of a page.
    • Parallel A comparison made; elaborate tracing of similarity; as, Johnson's parallel between Dryden and Pope.
    • Parallel A line which, throughout its whole extent, is equidistant from another line; a parallel line, a parallel plane, etc. "Who made the spider parallels design,
      Sure as De Moivre, without rule or line ?"
    • Parallel Anything equal to, or resembling, another in all essential particulars; a counterpart. "None but thyself can be thy parallel ."
    • Parallel Conformity continued through many particulars or in all essential points; resemblance; similarity. "Twixt earthly females and the moon
      All parallels exactly run."
    • Parallel Continuing a resemblance through many particulars; applicable in all essential parts; like; similar; as, a parallel case; a parallel passage.
    • Parallel Direction conformable to that of another line, "Lines that from their parallel decline."
    • Parallel (Geom) Extended in the same direction, and in all parts equally distant; as, parallel lines; parallel planes. "Revolutions . . . parallel to the equinoctial."
    • Parallel Fig.: To make to conform to something else in character, motive, aim, or the like. "His life is paralleled Even with the stroke and line of his great justice."
    • Parallel Having the same direction or tendency; running side by side; being in accordance (with); tending to the same result; -- used with to and with. "When honor runs parallel with the laws of God and our country, it can not be too much cherished."
    • Parallel (Mil) One of a series of long trenches constructed before a besieged fortress, by the besieging force, as a cover for troops supporting the attacking batteries. They are roughly parallel to the line of outer defenses of the fortress.
    • Parallel (Geog) One of the imaginary circles on the surface of the earth, parallel to the equator, marking the latitude; also, the corresponding line on a globe or map; as, the counry was divided into North and South at the 38th parallel .
    • Parallel (Elec) That arrangement of an electrical system in which all positive poles, electrodes, terminals, etc., are joined to one conductor, and all negative poles, etc., to another conductor; -- called also multiple. Opposed to series.
    • v. i Parallel To be parallel; to correspond; to be like.
    • Parallel To equal; to match; to correspond to.
    • Parallel To place or set so as to be parallel; to place so as to be parallel to, or to conform in direction with, something else. "The needle . . . doth parallel and place itself upon the true meridian."
    • Parallel To produce or adduce as a parallel. "My young remembrance can not parallel A fellow to it."
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: URanus' axis is at 97 degrees. which means that it orbits on its side. (Most of the planets spin on an axis nearly perpendicular to the plane of the ecliptic but Uranus' axis is almost parallel to the ecliptic.)
    • parallel In geometry, of lines (according to Euclid in his definition of parallel straight lines), lying in the same plane but never meeting however far they may be produced in either direction; of planes, never meeting however far they may be produced; in modern geometry, intersecting at infinity. The definition of Euclid is the traditional one; but the modern definition has three logical advantages: first, it is not, like the Euclidean definition, a negative one; second, it makes one conception applicable equally to parallel lines and parallel planes; and third, it is a statement which, whether literally true or not, must be admitted in form for the sake of the important generalizations which result from it.
    • parallel Having the same direction, tendency, or course.
    • parallel Continuing a resemblance through many particulars; like; similar; equal in all essential parts: as, a parallel case; parallel passages in the Evangelists.
    • parallel In music: Of two voice-parts, progressing so that the interval between them remains the same. Such progression is called parallel motion, and the intervals by which the two parts are separated are called parallel intervals. When the interval is a unison, an octave, or a perfect fifth, the progression is regarded as faulty: such progressions are called parallel unisons, octaves, or fifths, or simply parallels or consecutives. Parallel thirds and sixths are correct, and pleasing when not too long continued. Parallel seconds and sevenths are rare, and usually objectionable.
    • parallel Of tonalities, same as relative.
    • parallel In entorn., parallel-sided: as, parallel elytra,wings, etc.
    • parallel Milit., same as parallels. See II., 5.
    • parallel In music. See motion.
    • n parallel A line parallel to another line.
    • n parallel The intersection of a sphere by a plane perpendicular to its axis: such intersections of the terrestrial sphere are parallels of latitude, and are commonly represented on maps by lines drawn to every five or ten degrees (or less distances) between the equator and the poles. See latitude, 4.
    • n parallel Comparison made by placing things side by side: as, to draw a parallel between two characters.
    • n parallel A thing equal to or resembling another in all essential particulars; a counterpart.
    • n parallel Milit., a trench cut in the ground before a fortress, parallel to its defenses, for the purpose of covering the besiegers from the guns of the place.
    • n parallel In printing, a mark of reference in a printed text, thus ║, used to direct attention to a marginal note or a foot-note.
    • n parallel In music. See I., 4. In parallel, a method of connecting electric batteries or dynamos in which all of the positive poles are joined to one extremity of the circuit-wire, and all of the negative to the other. (See battery.) The connection is said to be in series when the positive pole of one cell or machine is joined to the negative of the next.
    • parallel To place in a position parallel to something else; make parallel.
    • parallel To make conformable to something else; make the same or closely similar in many or all essential particulars.
    • parallel To match; equal; rival.
    • parallel To show or furnish an equal to, or an equivalent for.
    • parallel To compare.
    • parallel To take a course parallel with.
    • parallel To be like or equal; agree.
    • parallel In archery, having the same diameter throughout its length; cylindrical: said of an arrow.
    • n parallel In electricity, the connection of two or more electric circuits or pieces of apparatus such that the current divides between them, that is, that they receive or produce the same voltage but different currents. Also called multiple.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Parallel par′al-lel side by side:
    • n Parallel a line equi-distant from another at all points: a line drawn across a map or round a globe at right angles to the axis, marking latitude: likeness: a comparison: counterpart:
    • v.t Parallel to place so as to be parallel: to correspond, or to make to correspond, to:—pr.p. par′alleling or par′allelling; pa.p. par′alleled or par′allelled
    • adj Parallel par′al-lel (geom.) extended in the same direction and equi-distant in all parts: with the same direction or tendency: running in accordance with: resembling in all essential points: like or similar
    • n Parallel (pl.) trenches, dug parallel to the outline of a besieged fortress to protect the besiegers (mil.)
    • ***


  • Bonstettin
    “To resist the frigidity of old age, one must combine the body, the mind, and the heart. And to keep these in parallel vigor one must exercise, study, and love.”
  • Ambrose Bierce
    “Faith. Belief without evidence in what is told by one who speaks without knowledge, of things without parallel.”
  • Henry Brooks Adams
    “One friend in a lifetime is much, two are many, three are hardly possible. Friendship needs a certain parallelism of life, a community of thought, a rivalry of aim.”


Webster's Revised Unabridged Dictionary
F. parallèle, L. parallelus, fr. Gr. ; para` beside + of one another, fr. other, akin to L. alius,. See Alien


In literature:

Celts and Teutons have preserved parallel traditions which are confirmed by history observed from without.
"Folklore as an Historical Science" by George Laurence Gomme
The case was not parallel to that of the Anglican Church.
"Apologia Pro Vita Sua" by John Henry Cardinal Newman
Two parallel avenues with trees cross the rectangular square at its longest side from north to south.
"Across Coveted Lands" by Arnold Henry Savage Landor
Square file, which may be tapering from end to end, or have parallel sides throughout.
"Practical Mechanics for Boys" by J. S. Zerbe
We came to a second range parallel with the one described before and extending from north-east to south-west.
"Across Unknown South America" by Arnold Henry Savage Landor
Every psychical change had to be conceived as parallel to a physiological change.
"Psychotherapy" by Hugo Münsterberg
Now Clay picked it up on the televideo, as it paralleled our course forty-five hundred miles out.
"Greylorn" by John Keith Laumer
Phenomena are parallel, Laws which make them so are themselves one.
"Natural Law in the Spiritual World" by Henry Drummond
There are many parallels in Greek ritual.
"The Religious Experience of the Roman People" by W. Warde Fowler
It is found only in Sicily, having, curiously enough, parallels in the rest of Europe, but none in Italy.
"Italian Popular Tales" by Thomas Frederick Crane

In poetry:

Thy will such a strange distance is,
As that to it
East and West touch, the poles do kisse,
And parallels meet.
"The Search" by George Herbert
Tinkle, tinkle, sweetly it sang to us,
Light was our talk as of faëry bells—
Faëry wedding-bells faintly rung to us
Down in their fortunate parallels.
"Divided" by Jean Ingelow
I sought the City and the hopes it held:
With smoke and brooding vapors intercurled,
As the thick roofs and walls close-paralleled
Shut out the fair horizons of the world—-
"The Need To Love" by Alan Seeger
Yea, thus having tasted all love with thy lips,
And having the warmth of thy hand in mine own,
Is it well that we wander, like parallel ships,
With the silence between us, aloof and alone?
"Cui Bono?" by Henry Kendall
Each following his own thought,--around us darkening
The rain-washed boundaries and stretching track,--
Each following those dim parallels and hearkening
For long-lost voices that will not come back.
"The Station-Master Of Lone Prairie" by Francis Bret Harte
Throughout Australian History no tongue or pen can tell
Of such preconcerted treachery — there is no parallel —
As the tragic deed of Morgan's death; without warning he was shot,
On Peechelba Station it will never be forgot.
"The Death of Morgan" by Anonymous Oceania

In news:

Ever since I first came across it, probably in the third grade, I've had trouble spelling the word parallel.
Topping tech headlines Thursday, Parallels debuted a new version of its software that takes advantage of Apple's new Mountain Lion OS, and will be able to run Windows 8.
Surprising Parallels Between Art and Science: Darwin and Mendelssohn .
The directing trio will shoot the historic/sci fi epic -- starring Halle Berry and Tom Hanks -- in parallel using two complete teams.
The Aspex Accelera solution is a PCI-X plug-in card with 16,000 parallel processing elements.
He straightened the patient's arm and held it parallel to the floor.
Parallels Between Present-Day Iran and Nazi Germany "History doesn't repeat itself," said Mark Twain, "but it does rhyme".
I booked my trip through Blue Parallel, a bespoke South American travel consultancy founded by former investment banker Emmanuel Burgio with his demanding ex-bosses in mind.
86-year-old Johanna Quaas Works the Parallel Bars .
Jets' Tebow, K-State's Klein Lead Parallel Lives .
Jets' Tebow, K-State's Klein lead parallel lives .
Parallelization of a program is simple in concept but can be more complex in actual implementation.
His new record 'Parallel South' is now available so take a gander.
JM Science's Potentiometric Titrator (COM-1700) can run four titrations and stirrers that easily allow end user to do different types of titration including potentiometric, photometric, polarization, and conductometric titrations in parallel.
Parallel Motion & Just Desserts.

In science:

For black hole both having non-zero linear momenta, the value of Mtot is maximal for parallel momenta and minimal for anti-parallel momenta.
Local and global properties of conformally flat initial data for black hole collisions
In a parallel processing environment, the time complexity may approach s ), depending on how well the parallel processing is applied.
Towards an Intelligent Database System Founded on the SP Theory of Computing and Cognition
In a parallel processing environment, the time complexity may approach O(N p ), depending on how well the parallel processing is applied.
Towards an Intelligent Database System Founded on the SP Theory of Computing and Cognition
The leading factor x0 denotes the Boltzmann weight for all-parallel spin configuration between neighboring sites (see Fig. 2), x1 is for the case with single antiparallel pair with the remaining being parallel, and so on.
Possibly Exact Solution for the Multicritical Point of Finite-Dimensional Spin Glasses
The performance of parallelism can be enhanced as the process of an inside module is partitioned into two parts (i.e. the estimating and the computing function parts) running in parallel.
EPspectra: A Formal Toolkit for Developing DSP Software Applications