hashtag

[ hash-tag ]
/ ˈhæʃˌtæg /

noun

(on social media websites)
  1. a word or phrase preceded by a hash mark (#), used within a message to identify a keyword or topic of interest and facilitate a search for it: The hashtag #sandiegofire was used to help coordinate an emergency response to the fire.
  2. a hash mark used in this way.
  1. a word or phrase preceded by a hash mark (#) or by the word hashtag, used to add wit or emphasis to a spoken or written statement.
  2. a hash mark or the word hashtag used in this way, as in the sentence His goodbye was so hashtag awkward.

verb (used with or without object), hash·tagged, hash·tag·ging.

to add a hashtag to (a word, topic, or message): Someone on Twitter just hashtagged the film festival.

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Origin of hashtag

First recorded in 2005–10; hash (mark) + tag1 (in the sense “a label or keyword”)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for hashtag

British Dictionary definitions for hashtag

hashtag
/ (ˈhæʃˌtæɡ) /

noun

(on the Twitter website) a word or phrase preceded by a hash mark, used to denote the topic of a post
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