The Collaborative International Dictionary of English v.0.48:
Tag \Tag\, v. t. [imp. & p. p. Tagged; p. pr. & vb. n.
1. To fit with, or as with, a tag or tags.
He learned to make long-tagged thread laces.
His courteous host . . .
Tags every sentence with some fawning word.
2. To join; to fasten; to attach. --Bolingbroke.
3. To follow closely after; esp., to follow and touch in the
game of tag. See Tag, a play.