Definition of alertness in English:

alertness

noun

mass noun
  • The quality of being alert.

    ‘Walsall were indebted to the bravery and alertness of their goalkeeper’
    ‘a lack of mental alertness’
    • ‘Travelers to such destinations practice extra alertness, precaution and prudence.’
    • ‘Nonetheless, he said, police would maintain a high degree of alertness.’
    • ‘Anything related to Taiwan's survival should be heeded with special alertness.’
    • ‘Fire has caused £30,000 damage to a woollen waste mill, and it could have been worse but for the alertness of a teenage girl.’
    • ‘Clydebank looked as though they had done enough for another valuable point, but they reckoned without the alertness of Alan Neil.’
    vigilance, awareness, watchfulness, attentiveness, attention, circumspection, wariness, chariness, heedfulness, canniness, discretion, prudence
    quick-wittedness, quick thinking, quickness of mind, sharpness, quickness, keenness, perceptiveness, responsiveness, agility, acuteness, acuity, shrewdness, astuteness, intelligence, insight, presence of mind
    View synonyms

Pronunciation

alertness

/əˈləːtnəs/