mid-15c., ultimately from Latin declinationem (nominative declinatio), noun of action from past participle stem of declinare (see decline (v.)); perhaps via French; "the form is irregular, and it [..]

See discussion under declined language or click here for example cases.

n. The change of endings in nouns and adj. to express their different relations of gender.

(n) the inflection of nouns and pronouns and adjectives in Indo-European languages(n) process of changing to an inferior state(n) a downward slope or bend(n) a class of nouns or pronouns or adjectives [..]

A term which refers to the inflections of nouns, pronouns, adjectives, i.e. of nouns and the elements which can qualify them. The set of inflections is called a nominal paradigm. The term declension c [..]

(grammar) The act of declining a word; the act of listing the inflections of a noun, pronoun or adjective in order. (grammar) A way of categorizing nouns, pronouns, or adjectives according to the [..]