feline /ˈfiːlaɪn/adjective 2noun 2forms 3 adjective2 •Of or pertaining to cats.The tiger is a feline predator. •catlike (resembling a cat); sleek, graceful, inscrutable, sensual, and/or cunning.She moved with feline grace. noun2 •A cat: member of the cat family Felidae. •Any member of Felinae, one of the two extant subdivisions of Felidae. formsfelines · more feline · most feline