Noun:
1: tag a label made of cardboard or plastic or metal
2: tag, shred, rag, tatter, tag end a small piece of cloth or paper
3: tag a game in which one child chases the others; the one who is caught becomes the next chaser
4: tag (sports) the act of touching a player in a game (which changes their status in the game)
Verb:
1: mark, label, tag attach a tag or label to; "label these bottles"
2: tag touch a player while he is holding the ball
3: tag provide with a name or nickname
4: give chase, tag, dog, trail, track, tail, chase, chase after, go after go after with the intent to catch; "The policeman chased the mugger down the alley"; "the dog chased the rabbit"
5: tag supply (blank verse or prose) with rhymes