say it: ri-VUR-zhuhn
reversion is a noun meaning "(law) an interest in an estate that reverts to the grantor (or his heirs) at the end of some period (e.g., the death of the grantee)". It carries 6 recorded senses.
(genetics) a return to a normal phenotype (usually resulting from a second mutation)
genetics
a reappearance of an earlier characteristic
turning in the opposite direction
returning to a former state
a failure to maintain a higher state
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for reversion come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.