• WordNet 3.6
    • v checkmate place an opponent's king under an attack from which it cannot escape and thus ending the game "Kasparov checkmated his opponent after only a few moves"
    • n checkmate a chess move constituting an inescapable and indefensible attack on the opponent's king
    • n checkmate complete victory
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The word "checkmate" in chess comes from the Persian phrase "Shah-Mat," which means the king is dead
    • Checkmate A complete check; utter defeat or overthrow.
    • Checkmate The position in the game of chess when a king is in check and cannot be released, -- which ends the game.
    • Checkmate (Chess) To check (an adversary's king) in such a manner that escape in impossible; to defeat (an adversary) by putting his king in check from which there is no escape.
    • Checkmate To defeat completely; to terminate; to thwart. "To checkmate and control my just demands."
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Century Dictionary and Cyclopedia
    • n checkmate In chess, originally, an exclamatory sentence, literally, ′ the king is dead′ : said of the opponent's king when he is in check, and cannot be released from it; hence, the position of being unable to escape from a check. Since it is a principle of the game that the king cannot be captured, this brings the game to a close, with the defeat of that player whose king is checkmated. See chess.
    • n checkmate Hence Figuratively, defeat; overthrow.
    • checkmate In chess, to put in check (an opponent's king), so that he cannot be released. See checkmate, n., 1.
    • checkmate Figuratively, to defeat; thwart; frustrate; baffle.
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Chambers's Twentieth Century Dictionary
    • Checkmate in chess, a check given to the adversary's king when in a position in which it can neither be protected nor moved out of check, so that the game is finished: a complete check: defeat: overthrow
    • ***


Webster's Revised Unabridged Dictionary
F. échec et mat, fr. Per. shāh māt, checkmate, lit., the king is dead, fr. Ar. māta, he died, is dead. The king, when made prisoner, or checkmated, is assumed to be dead, and the game is finished. See Chess
Chambers's Twentieth Century Dictionary
O. Fr. eschec, eschac (Low L. scaccus, scāchus, It. scacco, Sp. jaque, Ger. scach), through Ar. from Pers. shāh, king—Checkmate being O. Fr. eschec mat—Ar. shāh māt(a), 'the king is dead,' i.e. can make no further move.


In literature:

Well, Pachmann, to that I answer, 'Checkmate!
"The Destroyer" by Burton Egbert Stevenson
She was distinctly aware that Hetty had checkmated her.
"Hetty's Strange History" by Helen Jackson
How, with the help of Bud Lee, she checkmates Trevor's scheme makes fascinating reading.
"The Duke Of Chimney Butte" by G. W. Ogden
She wondered what excuse she could invent to checkmate that woman.
"The Cup of Fury" by Rupert Hughes
You alone hold the knight that means royalty triumphant or checkmated, and you know that you do.
"The Missourian" by Eugene P. (Eugene Percy) Lyle
Her placid, resolute, convincing denial checkmated his powers of thought.
"When Ghost Meets Ghost" by William Frend De Morgan
His plans are checkmated.
"Ivory Apes and Peacocks" by James Huneker
On the whole, the checkmate of the police seems surely impending.
"Letters from China and Japan" by John Dewey
When the adversary has only his king left, it is very easy to checkmate him with only a queen and king, or only a rook and king.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1" by Various
Then would the checkmate have been absolute.
"Lady Anna" by Anthony Trollope

In news:

Watching the second presidential debate, I realized again the checkmate we are living in.
2012 Career & Salary Survey: Checkmate .
Undisclosed Customer Settlement Checks Move Broker Into Regulatory Checkmate .
Checkmate for a Wall Street wizard.
4 Artists Who Have Potential To Checkmate Beyoncé.
Jonesboro youth, Bailey Stevens, has a five-move strategy for forcing chess opponents into a checkmate situation.
Playmate Checkmates Hef 's Mag.
'Brooklyn Castle' families turn to chess, avoid checkmate by Sandy (+video).
A checklist to help you avoid checkmate.
'Brooklyn Castle' families turn to chess , avoid checkmate by Sandy (+video).
Were locked in a checkmate that brought the countries to the brink of nuclear war.
Micromat ( has released Checkmate, a new automated diagnostic software product for the Mac.
Wolverines checkmate Knights in season opener.
Wiley and the Checkmates improve upon the current Soul music revival.
System upgrade Surfscan Technologies Cardiff South Wales UK Surfscan Technologies has upgraded its Checkmate diecut label inspection system.

In science:

For instance, if the properties to be checked are encoded in the logic rather than in the graph, there is no need to rewrite the rules of chess if one is interested in finding helpmates instead of checkmates, or if one just wants to know if any piece can be captured in two moves from a given position.
Minimal Proof Search for Modal Logic K Model Checking