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[feys-boo k] /ˈfeɪsˌbʊk/
the brand name of a social media service and website, launched in 2004.
verb (used with object)
to communicate with (a person) or search for information about (a person) by using Facebook: My old boyfriend just Facebooked me.
His future employer Facebooked him and decided to withdraw the job offer.
to post on Facebook: I facebooked some photos of my cat.
You should Facebook the event so more people will show up.
verb (used without object)
to use Facebook:
Does your mom Facebook?
Also, facebook for defs 2–4.
Origin of Facebook
1980-85; facebook, college student directory with personal photos and basic information
Usage note
The official trademarked name of the social-media platform and website is spelled “facebook,” all lowercase letters. Formal writing style—as exemplified by most news and book publishers—is to treat such names as regular proper nouns, in this case “Facebook,” using an initial capital letter. However, when a trade name begins with a lowercase letter followed by an uppercase one, such as eBay or iPad, this spelling is retained, even at the beginning of a sentence. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for Facebook
Contemporary Examples
Historical Examples
  • Civilisation waits for himall-enfolding, all-instructing civilisation, and he stands face to Facebook in handwith his last chance.

    The Lost Art of Reading Gerald Stanley Lee
British Dictionary definitions for Facebook


noun trademark
a popular social networking website
(transitive; sometimes not capital) to search for (a person's profile) on the Facebook website
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
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Contemporary definitions for Facebook

a school yearbook

Usage Note

informal's 21st Century Lexicon
Copyright © 2003-2014, LLC
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Word Origin and History for Facebook



directory listing names and headshots, by 1983, originally U.S. college students, from face (n.) + book. The social networking Web site dates from 2004.

Online Etymology Dictionary, © 2010 Douglas Harper
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