The Collaborative International Dictionary of English v.0.48:
Revert \Re*vert"\, v. t. [imp. & p. p. Reverted; p. pr. & vb.
n. Reverting.] [L. revertere, reversum; pref. re- re- +
vertere to turn: cf. OF. revertir. See Verse, and cf.
1. To turn back, or to the contrary; to reverse.
Till happy chance revert the cruel scence. --Prior.
The tumbling stream . . .
Reverted, plays in undulating flow. --Thomson.
2. To throw back; to reflect; to reverberate.
3. (Chem.) To change back. See Revert, v. i.
To revert a series (Alg.), to treat a series, as y = a + bx
+ cx^2 + etc., where one variable y is expressed in
powers of a second variable x, so as to find therefrom the
second variable x, expressed in a series arranged in
powers of y.