From WordNet (r) 3.0 (2006):
tag
n 1: a label written or printed on paper, cardboard, or plastic
that is attached to something to indicate its owner,
nature, price, etc. [syn: tag, ticket]
2: a label associated with something for the purpose of
identification; "semantic tags were attached in order to
identify different meanings of the word"
3: a small piece of cloth or paper [syn: rag, shred, tag,
tag end, tatter]
4: a game in which one child chases the others; the one who is
caught becomes the next chaser
5: (sports) the act of touching a player in a game (which
changes their status in the game)
v 1: attach a tag or label to; "label these bottles" [syn:
tag, label, mark]
2: touch a player while he is holding the ball
3: provide with a name or nickname
4: go after with the intent to catch; "The policeman chased the
mugger down the alley"; "the dog chased the rabbit" [syn:
chase, chase after, trail, tail, tag, give chase,
dog, go after, track]
5: supply (blank verse or prose) with rhymes