Definitions of garrison:

• noun:   a fortified military post where troops are stationed
• noun:   the troops who maintain and guard a fortified place
• noun:   United States abolitionist who published an anti-slavery journal (1805-1879)
• verb:   station (troops) in a fort or garrison
• name:  A surname (common: 1 in 5000 families; popularity rank in the U.S.: #578)