The Collaborative International Dictionary of English v.0.48:

Rebound \Re*bound"\ (r[-e]*bound"), v. i. [Pref. re- + bound:
   cf. F. rebondir.]
   1. To spring back; to start back; to be sent back or
      reverberated by elastic force on collision with another
      body; as, a rebounding echo.
      [1913 Webster]

            Bodies which are absolutely hard, or so soft as to
            be void of elasticity, will not rebound from one
            another.                              --Sir I.
                                                  Newton.
      [1913 Webster]

   2. To give back an echo. [R.] --T. Warton.
      [1913 Webster]

   3. To bound again or repeatedly, as a horse. --Pope.
      [1913 Webster]

   4. to recover, as from sickness, psychological shock, or
      disappointment.
      [PJC]

   Rebounding lock (Firearms), one in which the hammer
      rebounds to half cock after striking the cap or primer.
      [1913 Webster]