Tag1  —n. 1 label, esp. On an object to show its address, price, etc. 2 metal etc. Point on a shoelace etc. 3 loop or flap for handling or hanging a thing. 4 loose or ragged end. 5 trite quotation or stock phrase. —v. (-gg-) 1 provide with a tag or tags. 2 (often foll. By on, on to) join or attach.  tag along (often foll. By with) go along, accompany passively. [origin unknown]