ULTIMATUM

ultimatum

(noun) a final peremptory demand

Source: WordNet® 3.1

Etymology

Noun

ultimatum (plural ultimatums or ultimata)

A final statement of terms or conditions made by one party to another, especially one that expresses a threat of reprisal or war.

Source: Wiktionary

Ul`ti*ma"tum, n.; pl. E. Ultimatums, L. Ultimata. Etym: [NL. See Ultimate.]

Definition: A final proposition, concession, or condition; especially, the final propositions, conditions, or terms, offered by either of the parties in a diplomatic negotiation; the most favorable terms a negotiator can offer, the rejection of which usually puts an end to the hesitation.

Source: Webster’s Unabridged Dictionary 1913 Edition