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]

The Collaborative International Dictionary of English v.0.48:

Rebound \Re*bound"\, v. t.
   To send back; to reverberate.
   [1913 Webster]

         Silenus sung; the vales his voice rebound. --Dryden.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rebound \Re*bound"\, n.
   1. The act of rebounding; resilience.
      [1913 Webster]

            Flew . . . back, as from a rock, with swift rebound.
                                                  --Dryden.
      [1913 Webster]

   2. recovery, as from sickness, psychological shock, or
      disappointment.
      [PJC]

WordNet (r) 3.0 (2006):

rebound
    n 1: a movement back from an impact [syn: recoil,
         repercussion, rebound, backlash]
    2: a reaction to a crisis or setback or frustration; "he is
       still on the rebound from his wife's death"
    3: the act of securing possession of the rebounding basketball
       after a missed shot
    v 1: spring back; spring away from an impact; "The rubber ball
         bounced"; "These particles do not resile but they unite
         after they collide" [syn: bounce, resile, take a hop,
         spring, bound, rebound, recoil, reverberate,
         ricochet]
    2: return to a former condition; "The jilted lover soon rallied
       and found new friends"; "The stock market rallied" [syn:
       rally, rebound]

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "rebound":
   adaptability, backfire, backlash, backlashing, be reflected,
   be sent back, boom, boomerang, booming, bounce, bounce back,
   bounciness, bound, bound back, buoyance, buoyancy, cannon,
   cannon off, carom, comeback, contrecoup, echo, echo back,
   elasticity, extensibility, flexibility, fly back, give, growl,
   growling, grumble, grumbling, have repercussions, kick, kick back,
   kickback, lash back, liveliness, reboation, rebuff, recalcitrate,
   recalcitration, recoil, reecho, reflex, repercuss, repercussion,
   repulse, resile, resilience, resiliency, resound, resounding,
   responsiveness, return, reverberate, reverberation, ricochet, roll,
   rumble, rumbling, send back, snap, snap back, sound, spring,
   spring back, springiness, stretch, stretchability, stretchiness,
   thunder, thundering, tone, tonicity, tonus