fort in WordNet English dictionary

1. a fortified defensive structure
   fortress  fort 
   
2. a fortified military post where troops are stationed
   garrison  fort 
   

1. station (troops) in a fort
   fort 
   
2. enclose by or as if by a fortification
   fortify  fort 
   
3. gather in, or as if in, a fort, as for protection or defense
   fort  fort up