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Facebook

American  
[feys-book] / ˈfeɪsˌbʊk /
Also facebook
Trademark.
  1. a brand name for a social media service and website, launched in 2004.


verb (used with object)

  1. to communicate with (a person) or search for information about (a person) by using Facebook.

    My old girlfriend just facebooked me.

    His future employer Facebooked him and decided to withdraw the job offer.

  2. 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)

  1. to use Facebook.

    Does your mom Facebook?

Facebook British  
/ ˈfeɪsˌbʊk /

noun

  1. a popular social networking 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

verb

  1. (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

Spelling

The official trademarked name of the social media platform and website is now styled in all capital letters “FACEBOOK,” though prior to 2020 the trademarked style was “facebook,” in all lowercase letters. Formal writing—as exemplified by most news and book publishers—treats such names as regular proper nouns, in this case “Facebook,” using an initial capital letter, but not all caps. 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.

Etymology

Origin of Facebook

First recorded in 2000–05; from facebook, a college student directory with personal photos and basic information

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

By Saturday evening, a total of nearly 200 search and rescue personnel had joined in the search operation, according to a post on the department’s Facebook page.

From Los Angeles Times • May 31, 2026

Cuba's Ministry of Revolutionary Armed Forces stressed that "both delegations consider the meeting to have been positive" and they agreed "to maintain communication between the two military commands," according to a statement released on Facebook.

From Barron's • May 30, 2026

Appeals Centre Europe looked at 4,600 cases of Facebook, Instagram and Threads users who said they had been wrongly banned, but Meta provided evidence in fewer than 100 of these cases.

From BBC • May 28, 2026

A spokesperson for the company said Wednesday that Facebook Plus and Instagram Plus will be priced at $3.99 per month, while WhatsApp Plus will cost $2.99 a month.

From The Wall Street Journal • May 27, 2026

Chantal is the one who posts links to articles and sends me messages on Facebook.

From "American Street" by Ibi Zoboi

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