Wordnet 3.0
ADJECTIVE (1)
1. 
 not turned; 
- Example: "left no stone unturned"
The Collaborative International Dictionary of English v.0.48:
Unturned \Un*turned"\, a. [Pref. un- + turned.]
   Not turned; not revolved or reversed.
   [1913 Webster]
   To leave no stone unturned, to leave nothing untried for
      accomplishing one's purpose.
      [1913 Webster]
            [He] left unturned no stone
            To make my guilt appear, and hide his own. --Dryden.
      [1913 Webster]
WordNet (r) 3.0 (2006):
unturned
    adj 1: not turned; "left no stone unturned" [ant: turned]