tag2 past tense and past participle tagged, present participle tagging [transitive]
to attach a tag to something:
Each bird was tagged and released into the wild.
to give someone or something a name or title, or describe them in a particular way
be tagged (as) something
The country no longer wants to be tagged as a Third World nation.
to attach a tag in a computer program or document:
All the words are tagged with their part of speech.
to illegally paint your name on a wall, vehicle etc
5 American English
to touch someone you are chasing in a game, especially to touch someone with the ball in baseball
tag alongphrasal verb
Kate tagged along with mum and Vicky.
tag onphrasal verb
to add something, especially something that was thought of later
2 British English
to tag along