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Echelon Definition

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Other Echelon Definition

[n] a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
[n] a body of troops arranged in a line

Misc. Definitions

\Ech"e*lon\ ([e^]sh"e*l[o^]n), n. [F., fr. ['e]chelle ladder, fr. L. scala.]
1. (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. --Upton (Tactics).
2. (Naval) An arrangement of a fleet in a wedge or V formation. --Encyc. Dict. {Echelon lens} (Optics), a large lens constructed in several parts or layers, extending in a succession of annular rings beyond the central lens; -- used in lighthouses.
\Ech"e*lon\, v. t. (Mil.) To place in echelon; to station divisions of troops in echelon.
\Ech"e*lon\, v. i. To take position in echelon. Change direction to the left, echelon by battalion from the right. --Upton (Tactics).

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