Wordnet 3.0
ADJECTIVE (2)
1. 
 not wanted; 
 not needed; 
- Example: "tried to give away unwanted kittens"2. 
 not wanted; 
- Example: "undesirable impurities in steel"- Example: "legislation excluding undesirable aliens";"removed the unwanted vegetation"[syn: undesirable, unwanted]
The Collaborative International Dictionary of English v.0.48:
Unwanted \Unwanted\
   See wanted.
WordNet (r) 3.0 (2006):
unwanted
    adj 1: not wanted; not needed; "tried to give away unwanted
           kittens" [ant: wanted]
    2: not wanted; "undesirable impurities in steel"; "legislation
       excluding undesirable aliens";"removed the unwanted
       vegetation" [syn: undesirable, unwanted] [ant:
       desirable]