unbeknown

[uhn-bi-nohn]

adjective

unknown; unperceived; without one's knowledge (usually followed by to).

Also un·be·knownst

[uhn-bi-nohnst] /ˌʌn bɪˈnoʊnst/.

Origin of unbeknown

1630–40; un-¹ + beknown (late Middle English beknowe, past participle of beknowen); see be-, known

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unbeknown

Historical Examples of unbeknown

Where he come from and where he's gone to is unbeknown to me.
The Poet at the Breakfast Table
Oliver Wendell Holmes, Sr.
I told Grant if he could let Jeff Davis escape all unbeknown to himself, to let him go.
Abraham Lincoln
William Eleroy Curtis
All unbeknown to himself, she had made him stand for his King.
The Following of the Star
Florence L. Barclay
That, or a three-pronged fork, said Cole, unbeknown to any but herself.
The Search Party
G. A. Birmingham
That wonderful man, as is always prowling about, unbeknown to any one.
Cripps, the Carrier
R. D. (Richard Doddridge) Blackmore

British Dictionary definitions for unbeknown

unbeknown

adverb

(sentence modifier foll by to) without the knowledge (of a person)unbeknown to him she had left the country Also (esp Brit): unbeknownst

adjective

(postpositive usually foll by to) rare not known (to)

Word Origin for unbeknown

C17: from the archaic beknown known; see be-, know

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unbeknown

adj.

1630s, from un- (1) "not" + beknown (see beknow).