Wordnet 3.0
VERB (1)
1. 
 stop moving or become immobilized; 
- Example: "When he saw the police car he froze"[syn: freeze, stop dead]
WordNet (r) 3.0 (2006):
stop dead
    v 1: stop moving or become immobilized; "When he saw the police
         car he froze" [syn: freeze, stop dead]