reversion Definition

reversion
noun

1. A return to an earlier state, belief, etc.
2a. law.
The legal right (eg of an original owner or their heirs) to possess a property again at the end of a certain period, especially when the present owner dies;
2b. law.
Property to which someone has such a right.
3. Insurance which is paid on someone's death.
4. biol.
Said of individuals, organs, etc: a return to an earlier ancestral, and usually less advanced, type.

Derivative: reversionary
adj

Derivative: reversional
adj

Derivative: reversionally
adverb

Etymology: 14c: from Latin reversio a turning back.