noun (1)
\ ˈtag How to pronounce tag (audio) \
plural tags

Definition of tag

 (Entry 1 of 5)

1 : a loose hanging piece of cloth : tatter
2 : a metal or plastic binding on an end of a shoelace
3 : a piece of hanging or attached material specifically : a loop, knot, or tassel on a garment
4a : a brief quotation used for rhetorical emphasis or sententious effect
b : a recurrent or characteristic verbal expression
5a : a cardboard, plastic, or metal marker used for identification or classification license tags
b : a descriptive or identifying epithet
c : something used for identification or location : flag
e : price tag
f : an element of code in a computer document used especially to control format and layout or to establish a hyperlink
g : hashtag … nuns shared their daily lives on Instagram, Snapchat and Twitter with the tag #MediaNuns …— Elizabeth Bruenig
h : a string of text (such as the symbol @ followed by a person's username) that is used to tag a person or account in a social media post While it's impossible to prohibit a friend from tagging you, Facebook allows you to review all tags before they appear on your profile.— Lara Webster
6 : a detached fragmentary piece : bit
7 : a graffito in the form of an identifying name or symbol


verb (1)
tagged; tagging; tags

Definition of tag (Entry 2 of 5)

transitive verb

1 : to provide or mark with or as if with a tag: such as
a : to supply with an identifying marker or price was tagged at $4.95
b : to provide with a name or epithet : label, brand tagged him a has-been
c : to put a ticket on (a motor vehicle) for a traffic violation
d : to deface with a graffito usually in the form of the defacer's nickname
e : to supply (something, such as a social media post) with a hashtag Don't forget to submit your photos of Montreal via Facebook, Twitter and Instagram by tagging them with #ThisMtl.Montreal Gazette
f : to mention (another person or account) in a social media post in a way that causes the person or account to be notified of the post On Facebook, if someone wants to get your attention or make it clear to others that you are somehow connected to a post, they can tag you in it. Your name will be mentioned in the post or with the photo, and everyone else who sees it will also know that you are mentioned.— Dave Johnson Knowing how to tag someone on Facebook means also knowing how to tag someone on Twitter and Instagram. Simply use the @ symbol to start a tag.ThriveHive.com My friends went back and tagged me in all the photos I'd missed …— Rachel Kraus Instagram allows users to reshare posts they've been tagged in to their own Story.— Devon Delfino
2 : to attach as an addition : append
3 : to follow closely and persistently
4 : to hold to account especially : to charge with violating the law was tagged for … assault — Burt Woolis

intransitive verb

: to keep close tagging at their heels— Corey Ford


noun (2)

Definition of tag (Entry 3 of 5)

1 : a game in which the player who is it chases others and tries to touch one of them who then becomes it
2 : an act or instance of tagging a runner in baseball


verb (2)
tagged; tagging

Definition of tag (Entry 4 of 5)

transitive verb

1a : to touch in or as if in a game of tag
b : to put out (a runner) in baseball by a touch with the ball or the gloved hand containing the ball
2 : to hit solidly
3 : to choose usually for a special purpose : select
4 : to make a hit or run off (a pitcher) in baseball the batter tagged him for a home run

Definition of TAG (Entry 5 of 5)

the adjutant general

First Known Use of tag

Noun (1)

14th century, in the meaning defined at sense 1

Verb (1)

1627, in the meaning defined at transitive sense 1

Noun (2)

1738, in the meaning defined at sense 1

Verb (2)

1878, in the meaning defined at sense 1a

History and Etymology for tag

Noun (1)

Middle English tagge; akin to Middle Low German tagge, tacke twig, spike

Noun (2)

origin unknown

Learn More About tag

Time Traveler for tag

Time Traveler

The first known use of tag was in the 14th century

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Cite this Entry

“Tag.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tag. Accessed 28 Nov. 2021.

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More Definitions for tag


\ ˈtag How to pronounce tag (audio) \

Kids Definition of tag

 (Entry 1 of 4)

: a small flap or tab fixed or hanging on something a price tag a name tag


tagged; tagging

Kids Definition of tag (Entry 2 of 4)

1 : to follow closely and continually
2 : to put a tab or label on
tag along
: to follow another's lead in going from one place to another



Kids Definition of tag (Entry 3 of 4)

: a game in which one player who is it chases the others and tries to touch one of them to make that person it


tagged; tagging

Kids Definition of tag (Entry 4 of 4)

1 : to touch in or as if in a game of tag
2 : to touch a runner in baseball with the ball and cause the runner to be out


\ ˈtag How to pronounce tag (audio) \

Medical Definition of tag

 (Entry 1 of 2)

1a : a shred of flesh or muscle
b : a small abnormal projecting piece of tissue especially when potentially or actually neoplastic in character
2 : label


transitive verb
tagged; tagging

Medical Definition of tag (Entry 2 of 2)

: label tagged antibodies


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