actoris

Actoris is the Latin genitive singular form of the noun actor, meaning "of the actor" or "the actor's." In classical Latin, actor referred to a doer or participant in an action, and it could also carry a legal sense referring to a plaintiff or accuser in a lawsuit. The form actoris follows the standard pattern for third-declension nouns, with the genitive ending -is, used to indicate possession, attribution, or association.

In Latin texts, actoris appears within phrases where the noun it governs is in the appropriate case, often in inscriptions, legal writings, or scholarly commentary. For example, in a phrase such as liber actoris, the sense would be "the actor's book." Because Latin relies on inflected endings rather than word order, the same sequence can function in various syntactic positions depending on context.

Outside of Latin grammar and philology, actoris is not a widely used term in modern English and does not designate a distinct concept or field. It may appear only as a grammatical form discussed in linguistic or textual-criticism work, or as part of Latin-derived titles or phrases in scholarly or literary contexts.

See also: Latin language, Latin grammar, third-declension nouns, genitive case.