1 unbeknown | Definition of unbeknown

unbeknownst

adjective
un·​be·​knownst | \ ˌən-bi-ˈnƍn(t)st How to pronounce unbeknownst (audio) \
variants: or less commonly unbeknown \ ˌən-​bi-​ˈnƍn How to pronounce unbeknown (audio) \

Definition of unbeknownst

1 : happening or existing without the knowledge of someone specified usually used with to unbeknownst to us rumors were flying
2 : unknown

Keep scrolling for more

Synonyms for unbeknownst

Synonyms

unknown

Visit the Thesaurus for More 

Did You Know?

Unbeknownst derives from beknown, an obsolete synonym of known. But for a word with a straightforward history, unbeknownst and its older and less common variant unbeknown have created quite a flap among usage commentators. Despite widespread use (including appearances in the writings of Charles Dickens, A.E. Housman, and E.B. White), the two words have been called everything from "obsolete" to "vulgar." Our evidence, however, shows that both can be considered standard.

Examples of unbeknownst in a Sentence

unbeknownst to me, my mother was planning a party

Recent Examples on the Web

Instead, officials told WLBT-TV that Kostial went home around midnight before apparently leaving the house again, unbeknownst to her roommates. Fox News, "Ole Miss student charged in Ally Kostial's death was tracked to gas station, father says 'my son is innocent'," 24 July 2019 The conflict that GenovĂ©s had been agitating for during the original experiment managed to slip by, unbeknownst to him, then and now. Nathan Taylor Pemberton, The New Yorker, "“The Raft” Chronicles an Extreme Experiment with Human Nature," 18 July 2019 Edwards also echoed the reporters’ analysis that found those private schools purport to be better than their public counterparts, but in many cases are not, unbeknownst to participating families. Kim Chatelain, nola.com, "Edwards vows to push for changes to Louisiana voucher program after news investigation reveals flaws," 18 June 2019 The neighbor, who had agreed to pay $1,100 for the chairs and table, was watching through a window, unbeknownst to Shavies. Thomas Peele, The Mercury News, "Pinole police chief defends hiring fired deputy who filed false police report," 1 July 2019 The parents say their 4-year-old daughter had stolen a doll from a Family Dollar store, unbeknownst to them. CBS News, "Video of cops pointing guns at Phoenix family "saved us from all getting killed," father says," 17 June 2019 The Bible remained in Noyes’ family, unbeknownst to historians, for 150 years. Brigit Katz, Smithsonian, "A Bible Owned by Lincoln, Unknown to Historians for 150 Years, Goes on Display," 21 June 2019 Pozorski was worried about bothering the author — who, unbeknownst to Pozorski had retired from writing a few months earlier. Matthew Ormseth, courant.com, "Philip Roth, Novelist and Warren Resident, Remembered By Those Who Knew Him," 24 May 2018 Kovach was reportedly trying to find his daughter, who also was in the backseat of Coleman’s car, unbeknownst to Kovach. Anne Branigin, The Root, "White Ohio Cop Fired for Detaining Daughter’s Black Boyfriend for No Reason: ‘We’ll Make Shit Up as We Go’," 22 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unbeknownst.' 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 unbeknownst

1636, in the meaning defined at sense 1

History and Etymology for unbeknownst

un- entry 1 + obsolete English beknown known; unbeknownst, irregular from unbeknown

Keep scrolling for more

Keep scrolling for more

More Definitions for unbeknownst

unbeknownst

adjective
un·​be·​knownst | \ ˌən-bi-ˈnƍnst How to pronounce unbeknownst (audio) \
variants: also unbeknown \ -​ˈnƍn \

Kids Definition of unbeknownst

: happening without someone's knowledge : unknown Unbeknownst to him, we were planning a surprise party.

Keep scrolling for more

More from Merriam-Webster on unbeknownst

Thesaurus: All synonyms and antonyms for unbeknownst

Spanish Central: Translation of unbeknownst

Nglish: Translation of unbeknownst for Spanish Speakers