Wordnet 3.0
NOUN (1)
1. 
 hand tool for guiding handsaws in making crosscuts or miter joints; 
[syn: miter box, mitre box]
WordNet (r) 3.0 (2006):
mitre box
    n 1: hand tool for guiding handsaws in making crosscuts or miter
         joints [syn: miter box, mitre box]