Main Entry: de·clen·sion

Pronunciation: \di-ˈklen(t)-shən\

Function: noun

Etymology: Middle English declenson, modification of Middle French declinaison, from Latin declination-, declinatio grammatical inflection, turning aside, from declinare to inflect, turn aside

Date: 15th century

1 a : noun, adjective, or pronoun inflection especially in some prescribed order of the forms b : a class of nouns or adjectives having the same type of inflectional forms
2 : a falling off or away : deterioration
3 : descent, slope

— de·clen·sion·al \-ˈklen(t)-shə-n^əl\ adjective