- (on social media websites) 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.
- a hash mark used in this way.
- to add a hashtag to (a word, topic, or message): Someone on Twitter just hashtagged the film festival.
Origin of hashtag
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for hashtag
Michelle Obama tweeting a hashtag is somehow cause for outrage.Political Memes That Absolutely Must Die in 2015
January 1, 2015
Who even needs a court of law, let alone victim testimony, now that we have the hashtag?Shut Up, Lady Gaga’s Rape Isn’t About You
December 4, 2014
The hashtag has been used to label general rants about people getting naked for attention.#FixTheInternet: The Hashtag That Beat Back Kim Kardashian’s Butt
November 14, 2014
Go home and use that hashtag to let people know about the story.The Dishonor of Honor Killings
October 20, 2014
And briefly, it seemed like a hashtag triumph—pretty much everyone, everywhere, was outraged.When Activism Is Worse Than Apathy
October 6, 2014
- (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