Source : Webster's Revised Unabridged Dictionary (1913)

Clap \Clap\, v. t. [imp. & p. p. {Clapped}; p. pr. & vb. n.
   {Clapping}.] [AS. clappan; akin to Icel. & Sw. klappa, D,
   klappen, to clap, prate, G. klaffen, v. i., to split open,
   yelp, klopfen, v. t. & i., to knock.]
   1. To strike; to slap; to strike, or strike together, with a
      quick motion, so, as to make a sharp noise; as, to clap
      one's hands; a clapping of wings.

            Then like a bird it sits and sings, And whets and
            claps its silver wings.               --Marvell.

   2. To thrust, drive, put, or close, in a hasty or abrupt
      manner; -- often followed by to, into, on, or upon.

            He had just time to get in and clap to the door.
                                                  --Locke

            Clap an extinguaisher upon your irony. --Lamb.

   3. To manifest approbation of, by striking the hands
      together; to applaud; as, to clap a performance.

   {To clap hands}.
      (a) To pledge faith by joining hands. [Obs.] --Shak.
      (b) To express contempt or derision. [Obs.] --Lam. ii. 15.

   {To clap hold of}, to seize roughly or quickly.

   {To clap up}.
      (a) To imprison hastily or without due formality.
      (b) To make or contrive hastily. [Obs.] ``Was ever match
          clapped up so suddenly?'' --Shak.