The Collaborative International Dictionary of English v.0.48:

Stalemate \Stale"mate`\ (-m[=a]t`), n. (Chess)
   The position of the king when he can not move without being
   placed in check and there is no other piece which can be
   moved.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stalemate \Stale"mate`\, v. t. (Chess)
   To subject to a stalemate; hence, to bring to a stand.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stalemate
    n 1: a situation in which no progress can be made or no
         advancement is possible; "reached an impasse on the
         negotiations" [syn: deadlock, dead end, impasse,
         stalemate, standstill]
    2: drawing position in chess: any of a player's possible moves
       would place his king in check
    v 1: subject to a stalemate