Wordnet 3.0
ADJECTIVE (1)
1. 
 not firmly fastened or secured; 
- Example: "an unbarred door"- Example: "went through the unlatched gate into the street"- Example: "an unlocked room"[syn: unbarred, unbolted, unlatched, unlocked, unsecured]
WordNet (r) 3.0 (2006):
unlocked
    adj 1: not firmly fastened or secured; "an unbarred door"; "went
           through the unlatched gate into the street"; "an unlocked
           room" [syn: unbarred, unbolted, unlatched,
           unlocked, unsecured]