Wordnet 3.0
NOUN (2)
1. 
 a person who returns after a lengthy absence; 
2. 
 someone who has returned from the dead; 
ADJECTIVE (2)
1. 
 of or relating to or typical of a revenant; 
- Example: "revenant shrieks and groans"2. 
 coming back; 
- Example: "a revenant ghost"[syn: recurring, revenant]
WordNet (r) 3.0 (2006):
revenant
    adj 1: of or relating to or typical of a revenant; "revenant
           shrieks and groans"
    2: coming back; "a revenant ghost" [syn: recurring,
       revenant]
    n 1: a person who returns after a lengthy absence
    2: someone who has returned from the dead