Wordnet 3.0
ADJECTIVE (2)
1. 
 fitted with or secured by a key; 
- Example: "a keyed instrument"- Example: "the locks have not yet been keyed"2. 
 set to a key or tone; 
The Collaborative International Dictionary of English v.0.48:
Keyed \Keyed\ (k[=e]d), a.
   Furnished with keys; as, a keyed instrument; also, set to a
   key, as a tune.
   [1913 Webster]
   Keyed bugle. See Kent bugle.
      [1913 Webster]
WordNet (r) 3.0 (2006):
keyed
    adj 1: fitted with or secured by a key; "a keyed instrument";
           "the locks have not yet been keyed" [ant: keyless]
    2: set to a key or tone