A condition or period of heightened watchfulness or preparation for action: Nuclear-armed bombers were put on alert during the crisis.
from The American Heritage Dictionary of the English Language, 4th Edition
A signal that warns of attack or danger: Sirens sounded the alert for an air raid.
from The American Heritage Dictionary of the English Language, 4th Edition
The period during which an alert is in effect.
from Free Scrabble Dictionary
An urgent notice .
from Free Scrabble Dictionary
An alarm or other signal of danger.
from Free Scrabble Dictionary
verb-transitive
To notify of approaching danger or action; warn: a flashing red light that alerted motorists to trouble ahead.
from The American Heritage Dictionary of the English Language, 4th Edition
verb
To make aware of .
from Free Scrabble Dictionary
To call to a state of readiness .
from Free Scrabble Dictionary
adjective
Mentally responsive and perceptive; quick.
from The American Heritage Dictionary of the English Language, 4th Edition
Vigilantly attentive; watchful: alert to danger; an alert bank guard. See Synonyms at aware.
from The American Heritage Dictionary of the English Language, 4th Edition
Quick to perceive and act.
from Free Scrabble Dictionary
Watchful and prompt to meet danger or emergency.
from Free Scrabble Dictionary
idiom
On the alert Watchful and prepared for danger, emergency, or opportunity: bird watchers on the alert for a rare species.
from The American Heritage Dictionary of the English Language, 4th Edition
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