alertness

noun

alertness

noun

US /əˈlɝt.nəs/

Etymology From alert + -ness.

1

Usually The quality of being alert or on the alert.

THE human body was meant to have a midafternoon nap, according to a new consensus among sleep researchers who are studying the biological rhythms of sleep and alertness.1989 September 12, Daniel Goleman, “Feeling Sleepy? An Urge to Nap Is Built In”, in The New York Times:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.