hashtag

noun

hash·​tag ˈhash-ˌtag 

plural hashtags

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

Using the hashtag #shedeservedthepurse, people are recording themselves hiding money and gift cards in baby staples like diaper boxes and formula containers for moms to find and use to treat themselves.

—Meghan Overdeep

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

Attmu Mesh Shower Caddy Organizer The house purse hashtag on TikTok shows people using everything, including Bogg bags, totes, plastic shower caddies, and belt bags. —Stephanie Osmanski, Better Homes & Gardens, 9 Jan. 2026

McDonald’s is asking the public to share their stories using the hashtag #1in8Day. —Fielding Buck, Oc Register, 8 Jan. 2026

In 2022, the hashtag #MahsaAmini went viral globally. —Washington Post, 5 Jan. 2026

Organizer the Critics Choice Association says content will be available on Instagram and X @CriticsChoice, on TikTok @OfficialCriticsChoice, and on Facebook/CriticsChoiceAwards, with the hashtag #CriticsChoiceAwards. —Patrick Hipes, Deadline, 2 Jan. 2026

Word History

First Known Use

2007, in the meaning defined above

Rhymes for hashtag

• airbag
• handbag
• ragtag
• sandbag
• ag
• bag
• brag
• dag
• drag
• flag
• gag
• hag

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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)