Ultimatum

n.	1.	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 that a negotiator can offer, the rejection of which usually puts an end to the hesitation.
	2.	A final demand, the rejection of which may lead to a resort to force or other compelling action by the party presenting the ultimatum. In international diplomacy, an ultimatum may be used as by the demanding country as a signal to other countries that it gave the other country a seemingly reasonable opportunity to avoid a war; in this way, the demanding country may seek to avoid responsibility for starting a war.

Noun

1.

ultimatum - a final peremptory demand

ULTIMATUM. The last proposition made in making a contract, a treaty, and the like; as, the government of the United States has given its ultimatum, has made the last proposition it will make to complete the proposed treaty. The word also means the result of a negotiation, and it comprises the final determination of the parties concerned in the object in dispute.

admonishment, admonition, alarm, blackmail, boundary condition, call, call for, catch, caution, caveat, claim, clause, condition, conditions, contribution, demand, demand for, demands, deterrent example, donnee, draft, drain, duty, escalator clause, escape clause, escape hatch, exaction, example, extortion, extortionate demand, final notice, final offer, final warning, fine print, firm price, given, grounds, heavy demand, hint, imposition, impost, indent, insistent demand, joker, kicker, last word, lesson, levy, limiting condition, monition, moral, nonnegotiable demand, notice, notification, object lesson, obligation, order, parameter, prerequisite, provision, provisions, proviso, requirement, requisite, requisition, rush, rush order, saving clause, sine qua non, small print, specification, stipulation, stipulations, string, tax, taxing, terms, threat, tip-off, tribute, verbum sapienti, warning, warning piece, whereas