• Webster's Revised Unabridged Dictionary
    • prep Per Through; by means of; through the agency of; by; for; for each; as, per annum; per capita, by heads, or according to individuals; per curiam, by the court; per se, by itself, of itself. Per is also sometimes used with English words.
    • ***

Additional illustrations & photos:


Century Dictionary and Cyclopedia
  • Interesting fact: An average person uses the bathroom 6 times per day.
    • per Through; by means of. A Latin preposition, the source of the prefix per-, and used independently in certain Latin phrases common in English use, as per se, per saltum, especially in law phrases, as per capita, per curiam, per pares, per stirpes, etc. and certain common commercial phrases, as per centum, per diem, per annum, whence, by an imperfect translation, as a quasi-English preposition, in similar commercial phrases with an English noun, as per day, per week, per year, per hour, per hundred, per dozen, etc., per bearer, per express, by credit as per ledger, received per steamer Southampton, etc.
    • per A prefix of Latin origin, meaning primarily ‘through.’ See the etymology. It occurs chiefly in words formed in Latin, as in peract, peragrate, perambulate, etc. Though the primary sense of per- is usually distinctly felt in English, it is scarcely used in the formation of new words.
    • per As an inseparable prefix of intensity, ‘thoroughly,’ ‘very,’ as in peracute, perfervid, pellucid; specifically, in chem., noting the maximum or an unusual amount, as peroxid, the highest oxid, or an oxid containing more oxygen than the protoxid, etc.
    • n per In petrography, in the quantitative system of classification of igneous rocks (see rock), a prefix used to form adjectives, and showing that the factor or component indicated is present in any division of igneous rocks, alone or in extreme amount — that is, that its ratio to another factor is greater than : as, peralkalic, perfelic, perfemane, perfemic, etc.
    • n per An abbreviation of period.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: Cats sleep 16 to 18 hours per day.
    • prep Per pėr through, by means of, according to
    • ***


  • June Jordan
    “The purpose of polite behavior is never virtuous. Deceit, surrender, and concealment: these are not virtues. The goal of the mannerly is comfort, per se.”
  • Tommy Steele
    Tommy Steele
    “Show business is really 90 per cent luck and 10 per cent being able to handle it when it gets offered to you.”
  • John Mortimer
    John Mortimer
    “Farce is tragedy played at a thousand revolutions per minute.”
  • Robert Benchley
    Robert Benchley
    “The free-lance writer is a man who is paid per piece or per word or perhaps.”


Webster's Revised Unabridged Dictionary
L. Cf. Far For- Pardon, and cf. Par prep,


In literature:

I mean that it would be a hard job to figure sixteen and three-quarters per cent.
"The Cheerful Smugglers" by Ellis Parker Butler
Lots have advanced, within two or three years, in the business parts of the city, more than one thousand per cent.
"A New Guide for Emigrants to the West" by J. M. Peck
The average lease is 25 per cent., 40 per cent.
"Scientific American Supplement, No. 647, May 26, 1888" by Various
Mark three small test-tubes 10 per cent., 1 per cent.
"The Elements of Bacteriological Technique" by John William Henry Eyre
Eckles examined one in which the germ content was found to be 3200 per cc.
"Outlines of Dairy Bacteriology, 8th edition" by H. L. Russell
In 1915 the United States produced 40.5 per cent of the world's coal; in 1917 44.2 per cent; in 1918 46.2 per cent.
"The American Empire" by Scott Nearing
Of this total value coal represents roughly 61 per cent, petroleum 12 per cent, iron 6 per cent, copper 5 per cent, and gold 3 per cent.
"The Economic Aspect of Geology" by C. K. Leith
The average yield is one pound per tree per year.
"All About Coffee" by William H. Ukers
If a ten per centum reduction is to be considered as solving the problem in the case of epileptics what will the 86 per cent.
"A Plea for the Criminal" by James Leslie Allan Kayll
Of this number 2,848,258 or 55.2 per cent were farmers and 1,122,182 or 21.4 per cent were domestic servants.
"Negro Migration during the War" by Emmett J. Scott

In poetry:

Io pensero` alle sere,
Che, coi pochi diletti,
Confusi le preghiere
Per l'Arte, per il Vero e per gli affetti.
"Quando?" by Ferdinando Fontana
Tebe era mutola;--tacea Corinto;
Messene, esangue,--nelle sue mura
Chiudeva un popolo--per sempre vinto
Dalla sciagura.
"Il Secolo Di Pericle" by Ferdinando Fontana
I ne'er could lend on bill or band,
That five per cent. might blest me;
And borrowing, on the tither hand,
The deil a ane wad trust me.
"Ah, Woe Is Me, My Mother Dear" by Robert Burns
Quand'ei moveva per le nostre vie
Parlava sempre del supremo giorno,
Ed un nembo di canti e d'armonie
Al grosso capo gli aleggiava intorno.
"In Morte Di Emilio Praga" by Ferdinando Fontana
Pur vostre amour, allas, allas!
I am werse than I was
Per multa:
Jeo suy dolourouse en tut manere,
Woulde God in youre armes I were
"Lines from Love Letters" by Anonymous British
Egli visse sognando e sogna ancora
Chiuso per sempre in questa negra bara;
Sogna il tripudio della nuova aurora
E il fior, che per il maggio si prepara.
"In Morte Di Emilio Praga" by Ferdinando Fontana

In news:

Americans generate almost five pounds of trash per day per person.
From 1992 to 2002, the delay per traveler increased from 11 hours per year to 26 hours per year.
The solution will be available as a generic in 100 milligrams per 5 mL (20 milligrams per 1 mL).
For the analysis, International Slurry Surfacing Association (ISSA) quantity guidelines, ie, 20 pounds of material per square yard for wheel rut filling and 25 pounds per square yard for surface treatment, were used.
Swedish market pulp producer Sodra said that it will increase the price of its softwood pulp in Europe from USD 790 per tonne to USD 820.00 per tonne , effective November 1.
Turkmenistan - $0.72 per gallon ($0.19 per liter).
During his 2008-09 season with the Houston Rockets, Wafer averaged nearly as many shots per game at the rim (2.4 per game) as he attempted 3-pointers (2.6).
House Bill 1373 would permit Washington state wineries selling less than 6,000 gallons of wine per year to report state liquor taxes once per year rather than quarterly.
Kansas spends $1 billion per year on business incentives, which works out to be $355 per capita for one of the highest per capita costs in the nation, according to an in-depth analysis by the New York Times.
90 per person, $150 per person to enroll on the Host Committee.
Warren County did not request a change to the current contribution rate of $1.50 per telephone line per month.
Forward Anne Marie Armstrong averaged 11.5 points per game and 6.2 rebounds per game last season.
Main page ads are $2.00 per day or $45 per month.
Teacher Chris Caldwell said the program, which is offered through a 21st Century Learning Grant, is in its third year and provides daycare and a snack for $10 per week, per child.
The Warren Town Council agreed Tuesday night to lease his organization two acres of land at the farm for $500 per year per acre.

In science:

More precisely, by one integral over H per each node, of the product on one kernel per each link.
A finiteness proof for the Lorentzian state sum spinfoam model for quantum general relativity
Work supported in part by “Fondazione CARIPLO per la ricerca scientifica” under pro ject “Teoria delle perturbazioni per sistemi con simmetria”.
Poincare' normal forms and simple compact Lie groups
This usually implies one rewrite rule per term constructor, per traversal.
Typed Generic Traversal With Term Rewriting Strategies
Systems can be targeted to, e.g., all users, a particular user, a set of topics, or per user per topic. A lattice induced by these choices of targeting dimensions is shown in Fig. 6.
A Connection-Centric Survey of Recommender Systems Research
The ‘Syskill & Webert’ project combines the individual and topic targeting dimensions by targeting per user per topic (Fig. 6, top, the least upper bound). A user rates visited webpages on a three point scale and the system induces a user pro file by analyzing the in formation on each webpage.
A Connection-Centric Survey of Recommender Systems Research