The Collaborative International Dictionary of English v.0.48:

Laugh \Laugh\, v. t.
   1. To affect or influence by means of laughter or ridicule.
      [1913 Webster]

            Will you laugh me asleep, for I am very heavy?
                                                  --Shak.
      [1913 Webster]

            I shall laugh myself to death.        --Shak.
      [1913 Webster]

   2. To express by, or utter with, laughter; -- with out.
      [1913 Webster]

            From his deep chest laughs out a loud applause.
                                                  --Shak.
      [1913 Webster]

   To laugh away.
      (a) To drive away by laughter; as, to laugh away regret.
      (b) To waste in hilarity. "Pompey doth this day laugh away
          his fortune." --Shak.

   To laugh down.
      (a) To cause to cease or desist by laughter; as, to laugh
          down a speaker.
      (b) To cause to be given up on account of ridicule; as, to
          laugh down a reform.

   To laugh one out of, to cause one by laughter or ridicule
      to abandon or give up; as, to laugh one out of a plan or
      purpose.

   To laugh to scorn, to deride; to treat with mockery,
      contempt, and scorn; to despise.
      [1913 Webster]