/θreʃ ||; θrɛʃ/verb [T] to separate grains of corn, rice, etc from the rest of the plant using a machine or, especially in the past, by hitting it with a special tool （用机器为小麦、稻等）脱粒；（尤指旧时）打谷 ➔threshing noun [U]: a threshing machine 脱粒机