Revert meaning : One who, or that which, reverts. One who reverts to that religion which he had adhered to before having converted to another (due to the belief that all people are born Muslim) A convert to Islam. The act of reversion (of e.g. a database transaction or source control repository) to an earlier state. (now rare) To turn back, or turn to the contrary; to reverse. To throw back; to reflect; to reverberate. To cause to return to a former condition. (now rare) To return; to come back. To return to the possession of. To cause (a property or rights) to return to the previous owner. To return to a former practice, condition, belief, etc. To return to an earlier or primitive type or state; to take on the traits or characters of an ancestral type. To change back, as from a soluble to an insoluble state or the reverse. To take up again or return to a previous topic. (in Muslim usage, due to the belief that all people are born Muslim) To convert to Islam. (originally India, now also Singapore, Malaysia, Hong Kong) To reply (to correspondence, for example). To treat (a series, such as y = a + bx + cx2 + ..., where one variable y is expressed in powers of a second variable x), so as to find the second variable x expressed in a series arranged in powers of y.