their, pronoun 2) a form of the possessive case of singular they used as an attributive adjective, before a noun. a) (used to refer to a generic or unspecifie

their, pronoun 2) a form of the possessive case of singular they used as an attributive adjective, before a noun. a) (used to refer to a generic or unspecified person previously mentioned, about to be mentioned, or present in the immediate context): A parent should read to their child.