alertness
noun/əˈlɜːtnəs/
/əˈlɜːrtnəs/
[uncountable]- the ability to think quickly and to notice things
- Sleep deprivation could affect mental alertness.
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
- the fact of being aware of something, especially a problem or danger
- With a real threat of ambush, the crews remained at a high state of alertness.
Check pronunciation:
alertness