lest

Pronunciation

• IPA ^(key): /lɛst/

• Audio (US)

  (file)

Preposition

Preposition lest

1. (formal) If you do something lest something bad happen, you do it so that the bad thing doesn't happen.

   She said nothing, lest anyone think she didn't agree.

   Lest we forget, there are many wars happening right now.