- able to think quickly; quick to notice things
- Suddenly he found himself awake and fully alert.
- Two alert scientists spotted the mistake.
- Try to stay alert while driving at night.
- an alert mind
- mentally alert
Extra Examples- The machine should help to keep the pilot alert.
- There was a noise outside and he was suddenly alert.
Oxford Collocations Dictionaryverbs- be
- look
- seem
- …
- extremely
- fairly
- very
- …
- to
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- alert to something aware of something, especially a problem or danger
- We must be alert to the possibility of danger.
- She was alert to the slightest sound.
Oxford Collocations Dictionaryverbs- be
- look
- seem
- …
- extremely
- fairly
- very
- …
- to
Word Originlate 16th cent. (originally in military use): from French alerte, from Italian all' erta ‘to the watchtower’.
Check pronunciation:
alert