[ dɪ'klɛnʃ(ə)n ]
■ noun
1》 Grammar the variation of the form of a noun, pronoun, or adjective, by which its grammatical case, number, and gender are identified.
↘the class to which a noun or adjective is assigned according to this variation.
2》 archaic a condition of decline or moral deterioration.
Derivatives
~al adjective
Origin
ME declinson , from OFr. declinaison , from decliner 'to decline'.