"duplicate" as noun
1 - One that resembles or corresponds to another; an identical copy.
2 - An original instrument repeated; a document which is the same as another in all essential particulars, and differing from a mere copy in having all the validity of an original.
3 - A pawnbroker's ticket, which must be shown when redeeming a pledged item.
"duplicate" as verb
1 - To make a copy of.
2 - To do repeatedly; to do again.
3 - To produce something equal to.
"duplicate" as adjective
1 - Being the same as another; identical.
2 - (games) In which the hands of cards, tiles, etc. are preserved between rounds to be played again by other players.
