revert

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To go back to a former condition, practice, subject, or belief.
• intransitive verb To resume using something that has been disused.
• intransitive verb Law To be returned to the former owner or to the former owner's heirs. Used of money or property.
• intransitive verb Genetics To undergo reversion.
• intransitive verb Chiefly South Asian To reply.
• intransitive verb To cause to go back to a former condition, practice, subject, or belief.
• intransitive verb Law To return (an estate, for example) to the grantor or the grantor's heirs or successor.

from The Century Dictionary.

• noun One who or that which reverts; colloquially, one who is reconverted.
• noun In music, return; recurrence; antistrophe.
• noun That which is reverted. Compare introvert, n.
• To turn about or back; reverse the position or direction of.
• To alter to the contrary; reverse.
• To cast back; turn to the past.
• To turn back; face or look backward.
• To come back to a former place or position; return.
• To return, as to a former habit, custom, or mode of thought or conduct.
• In biology, to go back to an earlier, former, or primitive type; reproduce the characteristics of antecedent stages of development; undergo reversion; exhibit atavism.
• To go back in thought or discourse, as to a former subject of consideration; recur.
• In law, to return to the donor, or to the former proprietor or his heirs.
• In chem., to return from a soluble to an insoluble condition: applied to a change which takes place in certain superphosphates. See reversion, 8.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who, or that which, reverts.
• intransitive verb To return; to come back.
• intransitive verb (Law) To return to the proprietor after the termination of a particular estate granted by him.
• intransitive verb (Biol.) To return, wholly or in part, towards some preëxistent form; to take on the traits or characters of an ancestral type.
• intransitive verb (Chem.) To change back, as from a soluble to an insoluble state or the reverse.
• transitive verb To turn back, or to the contrary; to reverse.
• transitive verb To throw back; to reflect; to reverberate.
• transitive verb (Chem.) To change back. See Revert, v. i.
• transitive verb (Alg.) to treat a series, as y = a + bx + cx2 + 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun One who, or that which, reverts.
• noun A convert to Islam.
• noun computing The act of reversion (of e.g. a database transaction or source control repository) to an earlier state.
• verb transitive To turn back, or turn to the contrary; to reverse.
• verb To throw back; to reflect; to reverberate.
• verb transitive To cause to return to a former condition.
• verb intransitive To return; to come back.
• verb intransitive To return to the possession of.
• verb transitive To cause (a property or rights) to return to the previous owner.
• verb intransitive To return to a former practice, condition, belief, etc.
• verb intransitive, biology To return to an earlier or primitive type or state; to take on the traits or characters of an ancestral type.
• verb intransitive To change back, as from a soluble to an insoluble state or the reverse.
• verb intransitive To return to a previous subject of discourse or thought.
• verb intransitive To convert to Islam.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb go back to a previous state
• verb undergo reversion, as in a mutation