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Definition ultimatum in American English

ultimatum noun

[countable] noun
/ˌʌltɪˈmeɪtəm/
1

a statement that orders someone to do something and threatens to punish or attack them if they do not

Example

The management yesterday issued an ultimatum to the workforce.

Example

NATO gave the Serbs an ultimatum.

Synonyms and related words
Definition ultimatum in American English