Lest
Lest (lest) , intransitive verb
To listen. [Obsolete] — Chaucer. Spenser
Lest , noun
[See List to choose.]
Lust; desire; pleasure. [Obsolete] — Chaucer
Lest , adjective
Last; least. [Obsolete] — Chaucer
Lest , conjunction
[Old English leste, from Anglo-Saxon eȳ las eē the less that, where eȳ is the instrumental case of the definite article, and eē is an indeclinable relative particle, that, who, which. See The, Less, a.]
1.
For fear that; that... not; in order that... not.
Love not sleep, lest thou come to poverty.
Wherefore let him that thinketh he standeth take heed lest he fall.
2.
That (without the negative particle); -- after certain expressions denoting fear or apprehension.
I feared
Lest I might anger thee.