A level or rank in an organization, profession, or society.
A formation of troops, ships, etc., in diagonal parallel rows.
A line of riders seeking maximum drafting in a crosswind, resulting in a diagonal line across the road.
To form troops into an echelon.
Of a matrix: having undergone Gaussian elimination with the result that the leading coefficient or pivot (that is, the first nonzero number from the left) of a nonzero row is to the right of the pivot of the row above it, giving rise to a stepped appearance in the matrix.
The state of being an employee; employment.
To hire (somebody for work or a job).
To use (somebody for a job, or something for a task).
To make busy.