say it: ree-flek-SIV-i-tee
reflexivity is a noun meaning "the coreferential relation between a reflexive pronoun and its antecedent". It carries 2 recorded senses.
the coreferential relation between a reflexive pronoun and its antecedent
(logic and mathematics) a relation such that it holds between an element and itself
logic · mathematics
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 reflexivity 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.