Search Result for "mail slot":
Wordnet 3.0

NOUN (1)

1. a slot (usually in a door) through which mail can be delivered; 



The Collaborative International Dictionary of English v.0.48:

mail slot \mail slot\ n.
   A usually horizontal slot in a door through which mail can be
   delivered. It often has a hinged cover to keep the opening
   cloised when not in use.
   [WordNet 1.5 +PJC]


WordNet (r) 3.0 (2006):

mail slot
    n 1: a slot (usually in a door) through which mail can be
         delivered