a. 回动的

[化] 换向

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.

And that old dame said many an idle verse,
Out of her daughter's heart fond fancies to reverse.
--Spenser.

2. To cause to return; to recall. [Obs.]

And to his fresh remembrance did reverse
The ugly view of his deformed crimes. --Spenser.

3. To change totally; to alter to the opposite.

Reverse the doom of death. --Shak.

She reversed the conduct of the celebrated vicar of
Bray. --Sir W.
Scott.

4. To turn upside down; to invert.

A pyramid reversed may stand upon his point if
balanced by admirable skill. --Sir W.
Temple.

5. Hence, to overthrow; to subvert.

These can divide, and these reverse, the state.
--Pope.

Custom . . . reverses even the distinctions of good
and evil. --Rogers.

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.

{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.

Syn: To overturn; overset; invert; overthrow; subvert;
repeal; annul; revoke; undo.


Reversing \Re*vers"ing\, a.
Serving to effect reversal, as of motion; capable of being
reversed.

{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.