Alertness

//əˈlɝt.nəs// noun

noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    The quality of being alert or on the alert. uncountable, usually

    "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."

  2. 2
    lively attentiveness wordnet
  3. 3
    the process of paying close and continuous attention wordnet
  4. 4
    a state of readiness to respond wordnet

Synonyms

All synonyms
acuityagilityalertingarousalassiduityattention

Example

More examples

"His thin, hawk-like nose gave his whole expression an air of alertness and decision."

Etymology

From alert + -ness.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.