Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

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.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
The unions, under the Joint Action Committee of NASU and SSANU, had issued a 14-day ultimatum to the Federal Government on Monday 5th August, to meet their demands or face a nationwide strike.
''We issue an ultimatum of 48 hours to West Bengal government to meet the demands of the striking doctors there, failing which we would be forced to resort to an indefinite strike,'' the Resident Doctors Association told ANI.
He decides to give her an ultimatum: either she tells Jacob she doesn't love him anymore, or he's calling the cops.
This May, Ultimatum and iDEAQUEST are inviting people to share their personal stories around mental health and wellness using the hashtag #Care4Us.
All other establishments responded positively to the ultimatum issued by BIATF, except for Boracay Plaza, which is owned by a certain Anita Aguirre.
The factory issued an ultimatum - supported by the Phnom Penh Municipal Court - that the striking workers return to their jobs within 48 hours or be dismissed.
The Joint Health Sector Union (JOHESU), has given the Nigerian Government a seven-day ultimatum to reach a concrete agreement on its demands or risk a nationwide strike.
KARACHI -- Young Nurses Association (YNA) Sindh issued a 13-day ultimatum to Sindh health department to fulfill its demands and threatened to launch a province-wide protest movement from October 22, 2018 in case of failure.
Kate gives Rana an ultimatum She turns to her brother Imran for advice, who's been asked by their mum if he'll split his inheritance from their father, now Rana has seen sense and isn't gay any more.
DAP's Dr Boo Cheng Hau revealed today that he was in fact given an ultimatum by the party's leadership to accept or reject the offer to contest in the Labis parliamentary seat.
ANEWLY APPOINTED Ukip AM has told how she was given a two-hour ultimatum to sack her staff or be excluded from the party's group at the National Assembly.
Not a single Albanian political party in Macedonia even crosses their mind to respect the ultimatum of UCK and to leave state institutions.