Learner's definition of LEST
formal + literary
1
: for fear that唯恐;担心 —
used to say that you do not want something to happen用于表示你不想要某事发生 2
—
used when you are saying something in order to prevent something from happening以免;避免 -
And lest you think I'm joking, let me assure you that everything I've said is true.为了不让你以为我在开玩笑,我向你保证,我所说的一切都是真的。
-
She's a talented singer and, lest we forget, a fine musician as well. [=we should not forget that she is also a fine musician]她是有才华的歌手,还有,别忘了,她也是优秀的音乐家。