Garrison \Gar"ri*son\, n. [OE. garnisoun, F. garnison garrison, in OF. & OE. also, provision, munitions, from garnir to garnish. See Garnish.]

(Mil.)
   (a) A body of troops stationed in a fort or fortified town.
   (b) A fortified place, in which troops are quartered for its security.

In garrison, in the condition of a garrison; doing duty in a fort or as one of a garrison.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Garrison \Gar"ri*son\, v. t. [imp. & p. p. Garrisoned; p. pr. & vb. n. Garrisoning.]

(Mil.)
   (a) To place troops in, as a fortification, for its defense; to furnish with soldiers; as, to garrison a fort or town.
   (b) To secure or defend by fortresses manned with troops; as, to garrison a conquered territory.

Source: Webster's Revised Unabridged Dictionary (1913)