WordWeb Online

1. Not yet used or soiled
   "an unused envelope";
   - fresh
    
2. Not yet put into use
   "we bought an unused car for a change"
    
3. Not in active use
   "the machinery sat unused during the strike";
   - idle
    
4. Infrequently exposed to
   "feet unused to shoes"

See also: clean, inactive, new, unaccustomed