caution /ˈkɔ:ʃən/ I. n. 1.［u］小心，谨慎: talk with caution 讲话很谨慎 He registered the letter for caution’s sake. 为了慎重起见，他寄了挂号信。2.［c］注意(事项)，警告: give sb. a caution 给某人警告 ‖II.vt. 警告，劝…小心： caution sb. against being late告诫某人不要迟到；caution sb. (not) to do sth. 劝某人(不)做某事；caution sb. that… 警告某人…The theatre cautions “No Smoking”. 剧场明令“请勿吸烟”。