undeclared

adjective

un·​de·​clared ˌən-di-ˈklerd 

: not announced or openly acknowledged : not stated or decided in an official way : not declared

an undeclared war

an undeclared presidential candidate

a student with an undeclared major

Examples of undeclared in a Sentence

Recent Examples on the Web

The leader of the Reform UK party – which is topping most UK opinion polls – resigned as a member of parliament for Clacton-on-Sea, his constituency in southeast England, on Tuesday, amid mounting controversy over undeclared financial donations. — Billy Stockwell, CNN Money, 9 July 2026

There’s a mostly undeclared war in Eastern DRC driven by the staggering mineral wealth of the region. — Ivan Buendia Gayton, STAT, 7 July 2026

The alert is attributed to misbranding and an undeclared allergen because the item contains eggs, which are not identified on the product's label. — Chiara Kim, PEOPLE, 29 June 2026

Both Iran and the IAEA say Tehran hasn't been enriching uranium, but nonproliferation experts worry that the Islamic Republic may be moving its stockpile to undeclared areas. — ABC News, 24 June 2026

Word History

First Known Use

1526, in the meaning defined above

Rhymes for undeclared

• aired
• bared
• blared
• caird
• cared
• chaired
• dared
• erred
• fared
• flared
• glared
• haired