Identifying someone in a picture on Facebook by using @

verb

1. To supply with an identifying marker or price

   "was tagged at $4.95"

2. To provide with a name or epithet label, brand

   "tagged him a has-been"

3. To put a ticket on (a motor vehicle) for a traffic violation
4. To deface with a graffito usually in the form of the defacer's nickname
5. 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."

6. 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."

7. To attach as an addition append
8. To follow closely and persistently
9. To hold to account
10. Label
11. To keep close

    "tagging at their heels"

verb

1. To touch in or as if in a game of tag
2. To put out (a runner) in baseball by a touch with the ball or the gloved hand containing the ball
3. To hit solidly
4. To choose usually for a special purpose select
5. To make a hit or run off (a pitcher) in baseball

   "the batter tagged him for a home run"

verb

1. To attach a radio transmitter to (an animal)

   "tracked the movements of a radio-tagged owl"

verb

1. To follow another's lead especially in going from one place to another

verb

1. To touch a base before running in baseball after a fly ball is caught