6. 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, 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 a machine, to cause it to perform its revolutions or action in the opposite direction.
Synonym: To overturn, overset, invert, overthrow, subvert, [[r 1000 epeal]], annul, revoke, undo.
Origin: See Reverse, and cf. Revert.
(Science: mathematics) Reverse operation, an operation the steps of which are taken in a contrary order to that in which the same or similar steps are taken in another operation considered as direct; an operation in which that is sought which in another operation is given, and that given which in the other is sought; as, finding the length of a pendulum from its time of vibration is the reverse operation to finding the time of vibration from the length.
Origin: OE. Revers, OF. Revers, L. Reversus, p. P. Of revertere. See Revert.
1. That which appears or is presented when anything, as a lance, a line, a course of conduct, etc, is reverted or turned contrary to its natural direction. He did so with the reverse of the lance. (Sir W. Scott)
2. That which is directly opposite or contrary to something else; a contrary; an opposite. And then mistook reverse of wrong for right. (pope) To make everything the reverse of what they have seen, is quite as easy as to destroy. (Burke)
3. The act of reversing; complete change; reversal; hence, total change in circumstances or character; especially, a change from better to worse; misfortune; a check or defeat; as, the enemy met with a reverse. The strange reverse of fate you see; I pitied you, now you may pity me. (Dryden) By a reverse of fortune, Stephen becomes rich. (lamb)
Origin: Cf. F. Revers. See Reverse.