Echelon — Defs

01 n. 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…

1.
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.(Mil.)
2.
An arrangement of a fleet in a wedge or V form.(Naval)

Phrases & compounds

Echelon lens — a large lens constructed in several parts or layers, extending in a succession of annular rings beyond the central lens; -- used in lighthouses.

02 v. t. To place in echelon; to station divisions of troops in echelon.

1.
To place in echelon; to station divisions of troops in echelon.(Mil.)

03 v. i. To take position in echelon.

1.
To take position in echelon.
“Change direction to the left, echelon by battalion from the right.” — Upton (Tactics).