What does reversionary mean?
Reversionary describes something that tends to return, or is intended to return, to an earlier state. The word can refer to a proposal or policy seeking to restore previous rules, or to a genetic mutation in which an altered organism or character moves back toward its original form. As a noun, reversionary is a rare designation for someone who supports restoring an earlier political, social, or institutional order. In ordinary discussion the term sounds formal and uncommon, and it may carry the implication that the proposed return overlooks later developments. Its clearest specialized use is in genetics, where reversionary mutations can restore aspects of a normal phenotype without necessarily undoing every change that produced the altered version. Reversionary is related etymologically to reversion and revert, both of which express the idea of turning back.
Tending or intended to return to a former state, condition, or form; relating to a reversion.
"The researchers identified a reversionary mutation in the altered strain."
The term is uncommon outside specialized or formal contexts, although genetics provides its best-established technical usage.
Rarely, a person who favors or advocates a return to an earlier state, condition, or system.
"The political group portrayed its leader as a reversionary determined to restore the old constitution."
This noun sense is chiefly formal, uncommon, and often carries a negative implication of resisting later change.
The plural is used only of people and is very rarely needed.
"Several reversionaries opposed the proposed reform."
A reversionary mutation can make an altered organism resemble its original form again.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does reversionary come from?
The word was formed from reversion with the suffix -ary. Its deeper roots lie in Latin revertēre, meaning “to turn back,” composed of re- and vertere, “to turn,” which also underlies reverse and version.
Related word forms
How reversionary is actually used
The adjective is uncommon and sounds formal or technical. Its genetic sense is well established but specialized, while its use for a person advocating a political or institutional return is especially rare and may sound dismissive.
Easily confused with reversionary
Reversion is the process or act of returning to an earlier state, whereas reversionary more often characterizes a person, proposal, mutation, or other thing associated with that tendency.