de·clen·sionBrE/dɪˈklenʃn/NAmE/dɪˈklenʃn/noun (grammar语法) [C]asetofnouns, adjectivesorpronounsthatchangeinthesamewaytoshowcase, number and gender(名词、形容词或代词显示性、数、格的)变格[U]thewayinwhichsomesetsofnouns, adjectivesandpronounschangetheirformorendingstoshowcase, number or gender(名词、形容词和代词显示性、数、格的)词形变化