Wordnet 3.0
VERB (1)
1. 
 force or drive back; 
- Example: "repel the attacker"- Example: "fight off the onslaught"- Example: "rebuff the attack"[syn: repel, repulse, fight off, rebuff, drive back]
WordNet (r) 3.0 (2006):
fight off
    v 1: force or drive back; "repel the attacker"; "fight off the
         onslaught"; "rebuff the attack" [syn: repel, repulse,
         fight off, rebuff, drive back]