Attentive; awake; on guard.
brisk; nimble; moving with celerity.
A notification of higher importance than an advisory.
To give warning to.
Watchful, especially for danger or disorder; alert; wary
"Be vigilant for signs of disease in your garden."
quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant
"an alert police officer discovered a lorry full of explosive"
"schools need to be constantly alert to this problem"
able to think clearly; intellectually active
"she remained active and alert until well into her eighties"
the state of being watchful for possible danger
"security forces are on the alert for an upsurge in violence"
an announcement or signal warning of danger
"a bomb alert"
a period of vigilance following a warning of danger
"traffic was halted during the alert"
a signal on an electronic device that prompts the user to do something or attracts their attention
"a vibrating alert is a discreet alternative to ringtones"
warn (someone) of a danger or problem
"police were alerted after three men drove away without paying"
"he alerted people to the dangers of smoking"
Watchful; vigilant; active in vigilance.
Brisk; nimble; moving with celerity.
An alarm from a real or threatened attack; a sudden attack; also, a bugle sound to give warning.
Attentive to discover and avoid danger, or to provide for safety; wakeful; watchful; circumspect; wary.
condition of heightened watchfulness or preparation for action;
"bombers were put on alert during the crisis"
a warning serves to make you more alert to danger
an automatic signal (usually a sound) warning of danger
warn or arouse to a sense of danger or call to a state of preparedness;
"The empty house alarmed him"
"We alerted the new neighbors to the high rate of burglaries"
very attentive or observant;
"an alert and responsive baby is a joy"
"caught by a couple of alert cops"
"alert enough to spot the opportunity when it came"
"constantly alert and vigilant, like a sentinel on duty"
"an alert mind"
not unconscious; especially having become conscious;
"the patient is now awake and alert"
(usually followed by `to') showing acute awareness; mentally perceptive;
"alert to the problems"
"alive to what is going on"
"awake to the dangers of her situation"
"was now awake to the reality of his predicament"
carefully observant or attentive; on the lookout for possible danger;
"a policy of open-eyed awareness"
"the vigilant eye of the town watch"
"there was a watchful dignity in the room"
"a watchful parent with a toddler in tow"
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