Being on duty; keeping order; conveying orders.

A noncommissioned officer or soldier who attends a superior officer to carry his orders, or to render other service.

a soldier who serves as an attendant to a superior officer; "the orderly laid out the general's uniform"

a male hospital attendant who has general non-medical duties

Conformed to order; in order; regular; as, an orderly course or plan.

Observant of order, authority, or rule; hence, obedient; quiet; peaceable; not unruly; as, orderly children; an orderly community.

not haphazard; "a series of orderly actions at regular hours"

marked by system or regularity or discipline; "a quiet ordered house"; "an orderly universe"; "a well regulated life"