Revert

v. return to previous condition or belief; (about property) be returned to a former owner or his heirs (Law); return to an earlier form or type (Biology); return to a particular topic

n. person or thing which returns to a previous condition or belief; reversion, return of property to its owner after the occurrence of a particular event (Law)

Law In law, a reversion is an agreement such that one party (grantee) takes ownership of a piece of property from another (grantor) under the understanding that the ownership will "revert" back to the grantor at the expiration of the grantee's interest.The most common form of reversion agreement is for one person to allow another to own a house until their death, upon which time it reverts to reversion holder. Reversions themselves can be thought of as a form of derivative in which the underlying asset is a piece of property rather than a more usual financial instrument. Reversions can thus themselves be bought and sold.
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Verb
1. go back to a previous state; "We reverted to the old rules"
(synonym) return, retrovert, regress, turn back
(hypernym) change by reversal, turn, reverse
(hyponym) relapse, lapse, recidivate, regress, retrogress, fall back
(derivation) regression, regress, reversion, retrogression, retroversion
2. undergo reversion, as in a mutation
(hypernym) mutate

(v. t.)
To turn back, or to the contrary; to reverse.
  

(v. t.)
To throw back; to reflect; to reverberate.
  

(v. t.)
To change back. See Revert, v. i.
  

(v. i.)
To return; to come back.
  

(v. i.)
To return, wholly or in part, towards some preexistent form; to take on the traits or characters of an ancestral type.
  

(v. i.)
To return to the proprietor after the termination of a particular estate granted by him.
  

(v. i.)
To change back, as from a soluble to an insoluble state or the reverse; thus, phosphoric acid in certain fertilizers reverts.
  

(n.)
One who, or that which, reverts.
  

Synonyms and related words:
back, back up, backslide, cock, come after, come again, come back, come last, come up again, cry back to, echo, fall, fall again into, fall astern, fall back, fall behind, fall from grace, follow, get behind, go back, go back to, go backwards, go behind, have a relapse, jerk back, keep coming, lag behind, lapse, lapse back, lose ground, pull back, react, reappear, recede, recidivate, recur, recur to, regress, relapse, reoccur, repeat, resound, resume, retreat, retrocede, retroflex, retrograde, retrogress, retrovert, return, return to, reverberate, reverse, revert to, sink back, slide back, slip back, take up again, trail, trail behind, turn, yield again to