(tag) noun
1. Something tacked on or attached to something else; appendage.
2. A label tied or tacked on, as to a trunk; loosely, any label.
3. A loose, ragged edge of anything; tatter.
4. The tail or tip of the tail of any animal.
5. A matted and ragged lock of wool on a sheep; a loose lock of hair.
6. A worthless leaving; remnant; ort.
7. A flap or loop, as for drawing on a boot.
8. An aglet.
9. A decorative flourish, as on a signature.
10. In angling, a piece of bright material surrounding the shank of the hook in an artificial fly.
11. A lamb or yearling sheep.
12. A well–known quotation or saying, as in a song, poem, or book.
13. The refrain of a song or poem; also, the final lines of a speech in a play; catchword; cue.
14. The crowd; rabble: often in the phrases rag and tag and rag, tag, and bobtail.
—v. tagged, tag·ging v.t.
1. To supply, adorn, fit, mark, or label with a tag.
2. To shear away tags from (sheep).
3. To follow closely or persistently.
—v.i.
4. To follow closely at one's heels: The little boy tagged along. [Prob. <Scand. Cf. Sw. tagg spike, tooth, Norw. tagge tooth.]

(tag) noun
A juvenile game in which the object of the players is to keep from being caught or touched by one, the tagger (usually called “it”), who chases them for that purpose.
—v.t. tagged, tag·ging To overtake and touch, as in the game of tag. [<TAG¹]