ultimatum meaning, definition, what is ultimatum: a threat in which a person or group of people are warned that if they do not do a…. Learn more. An ultimatum (Latin: the last one) is a demand whose fulfillment is requested in a specified period of time and which is backed up by a threat to be followed through. Ultimatum definition, 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. Ultimatum: The Journey of a Lifetime is an intimate one week intensive with Donny Epstein where you will explore the invisible forces that shape your life, body, and. Ultimatum is an event that took place in (publishing year) 2009 on Earth-1610. It involved all of the major heroes of the Ultimate Universe in a conflict against the. Define ultimatum. ultimatum synonyms, ultimatum pronunciation, ultimatum translation, English dictionary definition of ultimatum. n. The Ultimatum: A Jeremy Fisk Novel and over one million other books are available for Amazon Kindle. Learn more Synonyms for ultimatum at Thesaurus.com with free online thesaurus, antonyms, and definitions. Dictionary and Word of the Day. An ultimatum is usually issued by a stronger power to a weaker one, since it wouldn't carry much weight if the one giving the ultimatum couldn't back up its threat.