beefsteak /ˈbiːfˌsteɪk/ noun6 •(A) steak cut from a cattle beast (e.g., cow, steer). •Ellipsis of beefsteak tomato. •Ellipsis of beefsteak plant, also known as perilla and shiso (Perilla frutescens var. crispa). •The herb prepared from the leaves of the beefsteak plant. •Ellipsis of beefsteak mushroom. •(no longer used) A celebratory dinner, commonly held in New York between about 1870 and 1940 involving the consumption of enormous quantities of broiled steak and beer. formsbeefsteaks