verb (old).—To open.

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  1567.  HARMAN, A Caveat or Warening for Common Cursetors (1814), p. 66. To DUP ye gyger, to open the dore.

2

  1596.  SHAKESPEARE, Hamlet, iv. 5. And DUPPED the chamber door.

3

  1609.  DEKKER, Lanthorne and Candlelight. If we … DUP but the gigger of a country-cove’s ken, from thence at the chats we trine in the Lightmans.

4

  1665.  R. HEAD, The English Rogue, pt. I., ch. v., p. 49 (1874), s.v.

5

  1691.  Academia, quoted in Notes and Queries, 6 S., xii., 416.

        Beside, it cost me twopence more,
To one that sits to DUP a dore.

6

  1724.  E. COLES, English Dictionary DUP, c. enter (the house).

7