A variation of the form of a noun, pronoun, or adjective, typically to express case, number, and gender. In Latin, the declension of nouns is essential for understanding their grammatical role in a sentence.
A class of nouns or adjectives having the same inflectional forms. The first declension in Latin includes many feminine nouns.
A decline or deterioration in quality or condition. The declension of the once-thriving city was evident in its abandoned buildings.