[ feys-book ]
/ 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?



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Also face·book for defs. 2-4 .

Origin of Facebook

1980–85; facebook, college student directory with personal photos and basic information

usage note for Facebook

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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for Facebook

British Dictionary definitions for Facebook

/ (ˈfeɪsˌbʊk) /

noun trademark

a popular social networking website


(tr; 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