echelon (plural echelons)
- A level#Noun|level or rank#Noun|rank in an organization, profession, or society.
- (cycling) A line#Noun|line of riders seeking maximum drafting#Noun|drafting in a crosswind, resulting in a diagonal line across the road.
- (military) A formation of troops, ship#Noun|ships, etc., in diagonal parallel row#Noun|rows. [from late 18th c.]
- en echelon
echelon (echelons, present participle echeloning; past and past participle echeloned)
- (transitive, military) To form#Verb|form troops into an echelon.
echelon (not comparable)
- (linear algebra) Of a matrix: having undergone Gaussian elimination with the result that the leading coefficient or pivot#Noun|pivot (that is, the first nonzero number#Noun|number from the left) of a nonzero row#Noun|row is to the right of the pivot of the row above it, giving rise to a stepped#Adjective|stepped appearance in the matrix.
- An international SIGINT network to monitor and gather intelligence from satellite trunk communications.