light sleeper; be vigilant; alert
Meanings
3 senses · 8 examplesadjective
light sleeper; easily awakened
Describes someone who wakes up easily from sleep.
He is the lightest sleeper; the slightest sound will wake him.
Taking care of the baby has made her a very light sleeper.
verb
to be vigilant; to be on the alert; to be mindful
formalOften used in a literary or formal context to urge learning from the past.
Understanding the past informs the future; this is worth being mindful of.
The lessons of history should serve as a warning to future generations.
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We must awaken from our failures and be more vigilant.
verb
to warn; to alert; to awaken (someone)
formalOften used in serious contexts to describe actions that serve as a caution or lesson.
This documentary aims to alert the world to environmental issues.
The teacher's admonition awakened him to the need to study hard.
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This accident should serve as a warning for us to pay attention to traffic safety.