Definitions for "Barracks"
Accomodation block used by quarrymen during the week
Building in which soldiers are housed
The 'pile' of cards containing Creatures and Guards. Cards in the Barracks can Engage in Battle with each other and deal damage to enemy Mages, examples are things like Nexan Creator, Cerberus and Samurai Yojimbo.
NYSP substation where Troopers report for duty, change their clothes and pick up their patrol vehicles.
Dormitories. There are usually two of these in a Weyr, one for Candidates, and one for Weyrlings.