Wordnet 3.0
ADJECTIVE (2)
1. 
 having the point made sharp; 
- Example: "a sharpened pencil"2. 
 made sharp or sharper; 
- Example: "a sharpened knife cuts more cleanly"
WordNet (r) 3.0 (2006):
sharpened
    adj 1: having the point made sharp; "a sharpened pencil"
    2: made sharp or sharper; "a sharpened knife cuts more cleanly"