- Navy, Military. a temporary grouping of units under one commander, formed for the purpose of carrying out a specific operation or mission.
- a group or committee, usually of experts or specialists, formed for analyzing, investigating, or solving a specific problem.
- a temporary grouping of military units formed to undertake a specific mission
- any semipermanent organization set up to carry out a continuing task
n.1941, originally military; see task (n.) + force (n.).