Dictionary![]() ![]() ul•ti•ma•tumPronunciation: (ul"tu-mā'tum, -mä'-), [key] —n., —pl. -tums, -taPronunciation: (-tu). [key] 1. a final, uncompromising demand or set of terms issued by a party to a dispute, the rejection of which may lead to a severance of relations or to the use of force. 2. a final proposal or statement of conditions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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