The condition or fact of guarding, protecting, or standing on the defensive; watch; esp. in to keep guard. Hence: the special service of watching…

The extra-professional duties of a soldier, sometimes allotted to him as punishment for misdemeanour; an instance of this.

Service in the army, police force, etc., consisting of shorter hours or less demanding activities, usually assigned to an individual following…

= 3.

= sense 3.

Military. Used in plural for: Duty or work in the stables; also the bugle-call for this duty, stable-call.

(a) acting in a way designed to attract men; (b) keeping company with women, regarded as a military duty.

the supportive work of planning, organization, etc., done by staff officers for the commander; also in civilian contexts.