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1. happening or existing without the knowledge of someone specified —usually used with to <unbeknownst to us rumors were flying> (Merriam-Webster Online).

2. a word that pretentious pricks use to try to sound smarter than they actually are.
Unbeknownst to you, I have been fucking your sister for the past six months.

My dad has been sick for years, unbeknownst to the family.
by TCAcycle February 05, 2010
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Feb 25 Word of the Day
Who fucking knows anymore? First, it meant factual, and now it means fictional. What the fuck, internet... what the fuck?
wrong-->"Oh my god, Jessica, your post literally scared me to death" right--> "I literally wrote this post at 3:04 A.M."
by Deathmatch1127 April 14, 2015
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Not a word pretentious pricks use. An extremely highly intellijated.., (also a new one) word, that only people with common fuckin' sense do. Actually, the proper spelling includes an apostrophe prior to the T.
I needed President T to speak to me, for some unbeknowns't reason.
by ThatonedudEric October 10, 2019
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