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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.

On Friday one of the divers put a picture on Facebook showing a man being dragged to safety.

From BBC • May 29, 2026

Meta in 2023 launched ad-free, paid versions of Facebook and Instagram in Europe to comply with EU data privacy legislation, giving users a choice between a free, ad-supported experience and a paid, ad-free one.

From Barron's • May 27, 2026

Other hassles include hospitals sometimes canceling contracts at the last minute, even after a nurse has arrived in town, said Rachel Altum, who helps run a Facebook group and an annual conference for travel nurses.

From The Wall Street Journal • May 27, 2026

According to the team, he "never realized Thecacera sesama was a new species until he consulted the sea slug expert 'Hsini Lin teacher' on Facebook."

From Science Daily • May 27, 2026

Plus, Jay doesn’t do the internet, unless it’s to watch YouTube or stalk friends and family on Facebook.

From "On the Come Up" by Angie Thomas

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