\ˈlest \

Definition of lest 

: for fear that often used after an expression denoting fear or apprehension worried lest she should be latehesitant to speak out lest he be fired

First Known Use of lest

before the 12th century, in the meaning defined above

History and Etymology for lest

Middle English les the, leste, from Old English thȳ lǣs the, from thȳ (instrumental of thæt that) + lǣs + the, relative particle

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Time Traveler for lest

The first known use of lest was before the 12th century

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More Definitions for lest

English Language Learners Definition of lest

: for fear that

—used when you are saying something in order to prevent something from happening

\ˈlest \

Kids Definition of lest

: for fear that “I have to be sharp and clever, lest I go hungry.”— E. B. White, Charlotte's Web

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More from Merriam-Webster on lest

Rhyming Dictionary: Words that rhyme with lest

Spanish Central: Translation of lest

Nglish: Translation of lest for Spanish Speakers

Britannica English: Translation of lest for Arabic Speakers

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