The Collaborative International Dictionary of English v.0.48:

Reverse \Re*verse"\, v. t. [imp. & p. p. Reversed
   (r[-e]*v[~e]rst");p. pr. & vb. n. Reversing.] [See
   Reverse, a., and cf. Revert.]
   1. To turn back; to cause to face in a contrary direction; to
      cause to depart.
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            And that old dame said many an idle verse,
            Out of her daughter's heart fond fancies to reverse.
                                                  --Spenser.
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   2. To cause to return; to recall. [Obs.]
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            And to his fresh remembrance did reverse
            The ugly view of his deformed crimes. --Spenser.
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   3. To change totally; to alter to the opposite.
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            Reverse the doom of death.            --Shak.
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            She reversed the conduct of the celebrated vicar of
            Bray.                                 --Sir W.
                                                  Scott.
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   4. To turn upside down; to invert.
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            A pyramid reversed may stand upon his point if
            balanced by admirable skill.          --Sir W.
                                                  Temple.
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   5. Hence, to overthrow; to subvert.
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            These can divide, and these reverse, the state.
                                                  --Pope.
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            Custom . . . reverses even the distinctions of good
            and evil.                             --Rogers.
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   6. (Law) To overthrow by a contrary decision; to make void;
      to under or annual for error; as, to reverse a judgment,
      sentence, or decree.
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   Reverse arms (Mil.), a position of a soldier in which the
      piece passes between the right elbow and the body at an
      angle of 45[deg], and is held as in the illustration.

   To reverse an engine or To reverse a machine, to cause it
      to perform its revolutions or action in the opposite
      direction.
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   Syn: To overturn; overset; invert; overthrow; subvert;
        repeal; annul; revoke; undo.
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The Collaborative International Dictionary of English v.0.48:

Reversing \Re*vers"ing\, a.
   Serving to effect reversal, as of motion; capable of being
   reversed.
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   Reversing engine, a steam engine having a reversing gear by
      means of which it can be made to run in either direction
      at will.

   Reversing gear (Mach.), gear for reversing the direction of
      rotation at will.
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