hash·​tag | \ ˈhash-ˌtag How to pronounce hashtag (audio) \
plural hashtags

Definition of hashtag

: a word or phrase preceded by the symbol # that classifies or categorizes the accompanying text (such as a tweet) You know a thing is really a thing these days when it has its own hashtag. And there it was last week, trending on Twitter alongside #cincodemayo and #happymothersday: #umpshow, which sprang up in the wake of some shockingly bad umpiring over the first six weeks of the major league season.— Joe Sheehan It's also true that a popular hashtag can benefit important and worthy subjects, such as the recently kidnapped Nigerian schoolgirls.— Mark Leibovich also : the symbol # as used in a hashtag

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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

Some Twitter users who were upset about the ad showed photos or videos of themselves throwing their Gillette razors in trash cans or tearing them apart, using hashtags like #BoycottGillette and #GilletteFail. Aisha Al-muslim, WSJ, "Gillette’s Ad With a #MeToo Edge Gets Mixed Reactions," 17 Jan. 2019 Similarly, hashtags like #transcrowdfund on Twitter, Instagram, Facebook, and Tumblr are full of folks brave enough to ask for help. Lucy Diavolo, Teen Vogue, "How to Help Transgender People Fight the Trump Administration's New Policy Memo," 22 Oct. 2018 Strike the #BalanceForBetter pose while wearing the color that stands for justice and dignity, and share it on social media using the hashtag #IWD2019. Selena Barrientos, Good Housekeeping, "Why International Women's Day Is Celebrated on March 8," 28 Feb. 2019 Use the hashtag #ComeAsYouAre on Instagram and constantly try to encourage self-respect, support others, and embrace your genuine self on the platform. Carolyn Twersky, Seventeen, "5 Body Positive Influencers Share How They Learned to Love Their Bodies," 26 Feb. 2019 Those who couldn't participate posted selfies in their all-black outfits and used the same hashtag. Erica Gonzales, Harper's BAZAAR, "The Most Powerful Moments from the National Protests Against Brett Kavanaugh," 24 Sep. 2018 Like the rest of us, Genevieve and Christian used a hashtag to celebrate their nuptials. Danielle Tullo, House Beautiful, "Everything You Need to Know About Genevieve Gorder's Dreamy Moroccan Wedding," 24 Sep. 2018 The campaign has its own special Twitter hashtag [#HIsman] and website [MiltonForHIsman. Mike Bianchi, OrlandoSentinel.com, "UCF's McKenzie Milton, Bama's Tua Tagovailoa are Polynesian pals we could all learn from," 5 July 2018 It's widely known that getting married can be expensive: For the typical wedding, there are venues to secure, DJs to pay, invitations to send out, and maybe a signature cocktail cleverly named after the newlyweds (or their wedding hashtag). refinery29.com, "This Is How Much Money Millennial Women Save To Attend Weddings," 10 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

17 Mar 2019

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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

Comments on hashtag

What made you want to look up hashtag? Please tell us where you read or heard it (including the quote, if possible).


a shady place in a garden or forest

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