hashtag

noun

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

Did you know?

Hashtags are an everyday part of Internet culture, thanks to social media. Originally designed for categorizing posts (i.e., tagging them) on Twitter, hashtags now commonly also supplement or comment on whatever text or image they accompany. The “hash” in hashtag is short for hash mark, a term for what we also call a pound sign or, if you want to apply the word-nerdiest designation, an octothorpe. Hash in this case is probably an alteration of hatch, a term for the lines artists sometimes use to add shading to a drawing. #WordNerdery

Examples of hashtag in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Fans have been calling on each other across Chinese social media to watch the film multiple times in cinemas via various hashtags. David Opie, IndieWire, 25 Feb. 2025 The #OscarsSoWhite hashtag went viral following the 2015 and 2016 nominations, when no people of color were nominated in the four acting categories. Bryan Alexander, USA TODAY, 21 Feb. 2025 Men across the country populated the hashtag with smiling images alongside vulnerable captions about personal growth and optimism. Char Adams, NBC News, 20 Feb. 2025 The hashtag #JusticeforIqra was included in the tweet. Angel Saunders, People.com, 19 Feb. 2025 See All Example Sentences for hashtag

Word History

First Known Use

2007, in the meaning defined above

Time Traveler
The first known use of hashtag was in 2007

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Cite this Entry

“Hashtag.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hashtag. Accessed 12 Mar. 2025.

Kids Definition

hashtag

noun
hash·​tag
ˈhash-ˌtag
: a word or phrase preceded by the symbol # that classifies or categorizes the accompanying text (as a tweet)
Last Updated: - Updated example sentences
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