hash·tag | \ˈhash-ˌtag \

Definition of hashtag 

: a word or phrase preceded by the symbol # that classifies or categorizes the accompanying text (such as a tweet)

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Did You Know?

Social media has made the hashtag a ubiquitous part of Internet culture, starting with Twitter and expanding to other sites. Originally designed for categorizing posts, the hashtag can now be a tool for a supplementary coy or witty comment (e.g., #awkward). The word tag can mean "a word or phrase used for description or identification." Hash is short for hash mark, a term for what we more commonly call a pound sign (and, less commonly, an octothorp). The hash in hash mark is probably an alteration of hatch, a term for the crisscrossing of lines (as when adding shading to a drawing).

Examples of hashtag in a Sentence

Recent Examples on the Web

With the use of the hashtag #CampaigningWhileBlack, people online are calling out Bynum's experience as another instance of racial profiling. De Elizabeth, Teen Vogue, "Someone Called the Police on Rep. Janelle Bynum as She Campaigned in Oregon," 5 July 2018 The change came in the wake of the 2015 viral hashtag #GiveDivasAChance, which called for giving WWE women wrestlers more face time. René A. Guzman, San Antonio Express-News, "Women’s wrestling now spotlights athleticism and skills over looks," 3 July 2018 It’s easier to analyze a large data set of specific hashtags than to manually comb through untagged content. Louise Matsakis, WIRED, "How Pro-Eating Disorder Posts Evade Filters on Social Media," 13 June 2018 Along with the politics and pathos, threads of whimsy, humor and hope wove through the proceedings on the heels of the hashtag #TonyDreaming. Jessica Gelt, latimes.com, "De Niro denounces Trump, Stoneman Douglas students bring everyone to tears and 'SpongeBob SquarePants' proves it really is a musical — this year's Tonys had it all," 11 June 2018 But momentum built, particularly with the spread of the #NegroniWeek hashtag on social media, and each subsequent year the project has grown. Brittany Martin, Los Angeles Magazine, "Negroni Week Is Here So You Can Sip Your Favorite Cocktail for a Good Cause," 1 June 2018 Such tweeting might include accounts using lots of unrelated hashtags or repeatedly mentioning of accounts that don’t follow them back. Georgia Wells, WSJ, "Twitter Makes Tweaks to Punish ‘Troll-Like Behavior’," 15 May 2018 The hooded reference in the hashtag isn't just about graduation regalia. Lisa Gutierrez, kansascity, "Taking back the hoodie: How #BlackandHooded celebrates black graduates | The Kansas City Star," 11 May 2018 Some of the hashtags included in the post were: #HopingForMoreWavingWithAllFiveFingers, #HowDoYouDoFellowKids and #HopingForAGoodTrialRun. Yesha Callahan, The Root, "Michigan Police Department Uses Microsoft Paint to Connect With Youth," 7 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hashtag.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hashtag

2007, in the meaning defined above

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Dictionary Entries near hashtag

hash out

hash sign



hash up



Statistics for hashtag

Last Updated

13 Oct 2018

Look-up Popularity

Time Traveler for hashtag

The first known use of hashtag was in 2007

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English Language Learners Definition of hashtag

: a word or phrase that starts with the symbol # and that briefly indicates what a message (such as a tweet) is about

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