Date: 1500-1600
Language: French
Origin: alerte, from Italian all' erta 'on the watch'


1 adjective
1 giving all your attention to what is happening, being said etc:
The animal raised its head, suddenly alert.
Taking notes is one of the best ways to stay alert in lectures.
2 able to think quickly and clearly:
Jack was as mentally alert as a man half his age.

be alert to something

to know about or understand something, especially a possible danger or problem:
The authorities should have been alert to the possibility of invasion.
alertness noun [uncountable]

Dictionary results for "alert"
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