un·​de·​clared | \ ˌən-di-ˈklerd \

Definition of undeclared

: 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

In 2014 Russian troops seized the Crimean peninsula and intervened on behalf of rebels in eastern Ukraine, an undeclared war that reportedly killed thousands. Kyle Mizokami, Popular Mechanics, "Russia Seizes Three Ukrainian Warships in Border Incident," 26 Nov. 2018 What the report North Korea’s missile base says CSIS’s report focuses on the Sakkanmol missile base, an undeclared North Korean site about 50 miles north of the inter-Korean border that houses short-range missiles. Alex Ward, Vox, "Trump insists things are going fine with North Korea. They’re not.," 12 Nov. 2018 Unfortunately, the company is voluntarily recalling 12 flavors of Rx Bars and three flavors of Rx Bar Kids bars due to the possible presence of an undeclared peanut allergen. Sarah Jacoby, SELF, "Some Rx Bars Have Been Recalled Due to an Undeclared Allergen," 16 Jan. 2019 MARIA BUTINA Accused of working as an undeclared foreign agent in the U.S., Butina is quickly becoming a cause celebre at home. Greg Norman, Fox News, "Russians accused of crimes abroad finding fame in their homeland," 13 Sep. 2018 Jailed since July on charges of working as an undeclared foreign agent, the 29-year-old Butina faced a hearing Monday in Washington. Matthew Bodner, The Seattle Times, "Misfire: Maria Butina’s strange route from Russia to U.S. jail," 10 Sep. 2018 If there was some sort of undeclared war against NATO, there would have to have been at least two, if not more engagements. Kyle Mizokami, Popular Mechanics, "Why Does This German Frigate Have Drone “Kill Marks”?," 27 Aug. 2018 Prosecutors say the undeclared income was money made consulting for Chicago businessmen in Zimbabwe, the Chicago Sun-Times reported. Dom Calicchio, Fox News, "Ex-congressman says he's 'given up on America' after sentenced for 3rd conviction," 11 May 2018 As the Holy Saturday Resurrection Ceremony begins, locals take to the streets to participate in the undeclared war and shoot fireworks and other explosives into the sky. Vanesa Brashier, Houston Chronicle, "Fireworks show coming to Cleveland July 4," 15 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'undeclared.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of undeclared

1526, in the meaning defined above

Keep scrolling for more

Learn More about undeclared

Share undeclared

Statistics for undeclared

Last Updated

17 Feb 2019

Look-up Popularity

Time Traveler for undeclared

The first known use of undeclared was in 1526

See more words from the same year

Keep scrolling for more

More Definitions for undeclared



English Language Learners Definition of undeclared

: not stated or decided in an official way : not declared


un·​de·​clared | \ ˌən-di-ˈklerd\

Kids Definition of undeclared

: not made known : not declared an undeclared war

More from Merriam-Webster on undeclared

Nglish: Translation of undeclared for Spanish Speakers

Britannica English: Translation of undeclared for Arabic Speakers

Comments on undeclared

What made you want to look up undeclared? Please tell us where you read or heard it (including the quote, if possible).


marked by fawning attentiveness

Get Word of the Day daily email!

Test Your Vocabulary

What did you just call me?! A Quiz

  • rows-of-various-emoji
  • If a member of the audience describes your speech as bombastic, does that person mean it is:
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!