• WordNet 3.6
    • n echelon a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
    • n echelon a body of troops arranged in a line
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Webster's Revised Unabridged Dictionary
    • Echelon (Mil) An arrangement of a body of troops when its divisions are drawn up in parallel lines each to the right or the left of the one in advance of it, like the steps of a ladder in position for climbing. Also used adjectively; as, echelon distance.
    • Echelon (Naval) An arrangement of a fleet in a wedge or V form.
    • v. t Echelon (Mil) To place in echelon; to station divisions of troops in echelon.
    • v. i Echelon To take position in echelon. "Change direction to the left, echelon by battalion from the right."
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Century Dictionary and Cyclopedia
    • n echelon A step-like arrangement or order; specifically, a military disposition of troops of such a nature that each division, brigade, regiment, company, or other body occupies a position parallel to, but not in the same alinement with, that in front, thus presenting the appearance of steps, and capable of being formed into one line by moving each of the less advanced divisions, etc., forward until they all aline. Troops so disposed are said to be in echelon. A fleet is said to be in echelon when it presents a wedge-form to the enemy, so that the bow-guns and broadsides of the several ships can defend one another.
    • echelon To form in echelon.
    • n echelon Milit., one of the subdivisions of a command marching in echelon.
    • n echelon In optics, a set of glass plates placed one upon another, with the edge of each projecting slightly, stepwise, beyond the edge of the preceding one. The device, which is due to A. A. Michelson, is used for the production of diffraction spectra of high dispersion and resolving power.
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Chambers's Twentieth Century Dictionary
    • n Echelon esh′e-long an arrangement of troops in battalions or divisions placed parallel to one another, but no two on the same alignment, each having its front clear of that in advance.
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Webster's Revised Unabridged Dictionary
F., fr. échelle, ladder, fr. L. scala,
Chambers's Twentieth Century Dictionary
Fr., from échelle, a ladder or stair. See Scale.


In literature:

Here were the offices of the top echelons of the Force Command Staff.
"The Cosmic Computer" by Henry Beam Piper
And the boats pulled out nearer, and by an echelon movement took their places in line.
"The Rifle Rangers" by Captain Mayne Reid
Joined 3rd Echelon, as Record Officer, 22nd March, 1917.
"With a Highland Regiment in Mesopotamia" by Anonymous
The heavy columns moved down the side of the ridge, the brigades marching in echelon.
"The Bishop of Cottontown" by John Trotwood Moore
The 1st Corps was echeloned on the right and in rear of the 2nd.
"1914" by John French, Viscount of Ypres
It would be well for some pieces in each echelon to be kept loaded with canister, so as to drive the enemy back if he should press very close.
"A Treatise on the Tactical Use of the Three Arms: Infantry, Artillery, and Cavalry" by Francis J. Lippitt
T. to 3rd Echelon, G.H.Q.
"The 28th: A Record of War Service in the Australian Imperial Force, 1915-19, Vol. I" by Herbert Brayley Collett
The infantry presented a front of three brigades marching in echelon.
"Khartoum Campaign, 1898" by Bennet Burleigh
The brigades formed in echelon.
"Robert Toombs" by Pleasant A. Stovall
Sheridan formed his line of battle with Merritt on the right, Devin to Merritt's left, Custer and Gregg, en echelon, still farther to the left.
"Personal Recollections of a Cavalryman" by J. H. (James Harvey) Kidd

In news:

The state Department of Education is seeing change in its upper-echelons, as Superintendent Janet Barresi's new chief of staff comes on board.
WEST LAFAYETTE, Indiana, March 19 STANFORD's Julia Smit joined the upper echelon of distance medley swimmers in the history of NCAA women's swimming as she claimed her third straight title in the 400 IM.
Hersh places the Lipinski in the upper echelon of the extant Stradivari violins.
Papa Murphy's hopes its take-and-bake pizza and streamlined operation deliver it unto the upper echelon of national pizza brands.
Rebilas for ESPN.comOff the mark: Matt Mitrione failed to hit his target of breaking into the heavyweight upper-echelon.
Rice's withdrawal raises concerns about diversity in upper echelon of Obama's next Cabinet.
Ellington speeds into high school track's upper echelon.
If the UC Merced women’s volleyball team was going to compete with the upper echelon of NAIA schools, it needed to be faster.
AJ Mast/Icon SMITom Crean's playing career didn't extend beyond high school ball but that hasn't prevented him from reaching the upper echelon of the coaching ranks.
A BACnet interface for i.LON SmartServers, developed in partnership with Echelon Inc to be the LonWorks/BACnet gateway application for the i.LON SmartServer, is now available for download, trial, and purchase.
Report Alleges 'Highest Echelons' of the Justice Department Knew About Fast and Furious.
Bin Laden documents show the idea had reached group's upper echelons.
Miller 's ascension to the top echelon among sports labor leaders was by no means free from controversy among those he would represent.
Pink Floyd is in that upper echelon of iconic classic-rock bands that's always popular, regardless of pop-culture trends or musical fads.
On the one hand, they recently won the Album of the Year Grammy, by definition moving them into the upper echelon of working musicians.

In science:

I(G) up to some degree d, we produce a matrix of constructible functions that gives the entries of the reduced row echelon form of X , as functions of p.
Polynomial Bounds for Invariant Functions Separating Orbits
Define the triangular reduced row echelon form (tRREF) of A to be the n × n matrix RA = (rij ) whose j th row rj is nonzero if and only if the reduced row echelon form (RREF) of A has a pivot in column j .
Polynomial Bounds for Invariant Functions Separating Orbits
The other is the fact that the divisors involved in the echelon modifications are, in a sense, smaller than the ’obvious’ divisors one could work with.
Echelon modification of vector bundles
Our purpose here is to define the notion of echelon datum on a scheme.
Echelon modification of vector bundles
An echelon datum is said to be scalar if δi = ni δ, Di = ni D for all i and fixed effective divisors δ, D.
Echelon modification of vector bundles