(in certain inflected languages) noting a case of nouns, pronouns, or adjectives, used primarily to express possession, measure, or origin

as John's hat, week's vacation, duty's call.

noting an affix or other element characteristic of this case, or a word containing such an element.

similar to such a case form in function or meaning.

the genitive case.

a word in the genitive case.

a construction noting this case or the relationship usually expressed by it.