plugged (Adjective) — (of a coin) altered by the insertion of a plug of base metal.
plugged (Adjective) — Completely obstructed or closed off. ex. "the drain was plugged"
plugged (Verb) — Fill or close tightly with or as if with a plug. ex. "plug the hole"
plugged (Verb) — Persist in working hard. ex. "Students must plug away at this problem"
plugged (Verb) — Deliver a quick blow to. ex. "he plugged me in the stomach"
plugged (Verb) — Advertise; praise the qualities of something in order to sell or promote.
plugged (Verb) — Insert a plug into. ex. "plug the wall"
plugged (Verb) — Insert as a plug. ex. "She plugged a cork in the wine bottle"