1. the brand name of 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 boyfriend 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?

noun trademark

  1. a popular social networking website


  1. (tr; sometimes not capital) to search for (a person’s profile) on the Facebook website

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

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