noun
hashtag
HASH-tag
noun
1
A word or phrase preceded by a # sign, used to tag and group posts on social media.
"The campaign's hashtag went viral within hours."
verb
1
To label a post with a hashtag.
"She hashtagged the photo with the event's name."
How to Use Hashtag
Learner’s notesIn plain EnglishA clickable # label used to group social media posts around a topic.
Common pairings
trending hashtag
use a hashtag
hashtag campaign
Word Forms
hashtagged past tense, hashtags plural, hashtags singular
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The campaign's _____ went viral within hours.
Etymology
Coined from "hash" (the # symbol) plus "tag"; the format was popularized on Twitter from around 2007 as a way to group related posts.