- A subunit of the Special Forces, usually consisting of 12 soldiers.
- Informal A group consisting of the best members of a larger group; an elite group: an A-team of foreign-policy advisers.
Origin of A-teamInformal name for A-detachment : a1, first in a series + detachment.
- Alternative form of A team.
(plural A teams)
In sports, teams are often labeled, A team, B team, C team, etc. or 1st, 2nd 3rd. In informal usage, only "A team" is used.