Definition of genitives:
(adj) :
(grammar) Of a grammatical case: in an inflected language (such as Greek or Latin), expressing that a thing denoted by a word is related to a thing denoted by another word as its origin or possessor; and in an uninflected language (such as English), expressing origin or possession; possessive.
(adj) :
(grammar) Of, pertaining to, or used in the genitive case.
(n) :
(countable) A word inflected in the genitive case, and which thus indicates origin or possession.
(adj) :
(archaic) Of or pertaining to the generation of offspring; generative, procreative, reproductive.
(n) :
(countable, uncountable) Ellipsis of genitive case (“a grammatical case used to express a relationship of origin or possession”). [(grammar) The grammatical case, chiefly applicable to nouns, used to express a relationship of origin or possession. It corresponds roughly to the English preposition of and the suffix -'s.]