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alertness    音标拼音: [əl'ɚtnəs]
n. 警戒,机敏

警戒,机敏

alertness
n 1: the process of paying close and continuous attention;
"wakefulness, watchfulness, and bellicosity make a good
hunter"; "vigilance is especially susceptible to fatigue"
[synonym: {watchfulness}, {wakefulness}, {vigilance},
{alertness}]
2: a state of readiness to respond; "alerting was indicated by
the desynchronization of the EEG" [synonym: {alertness},
{alerting}]
3: lively attentiveness [synonym: {alertness}, {sharp-sightedness},
{on the qui vive}]


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  • ALERTNESS Definition Meaning - Merriam-Webster
    watchful, vigilant, wide-awake, alert mean being on the lookout especially for danger or opportunity watchful is the least explicit term vigilant suggests intense, unremitting, wary watchfulness wide-awake applies to watchfulness for opportunities and developments more often than dangers
  • Alertness - Wikipedia
    Alertness is a state of active attention characterized by high sensory awareness Someone who is alert is vigilant and promptly meets danger or emergency, or is quick to perceive and act Alertness is a psychological and physiological state
  • ALERTNESS | English meaning - Cambridge Dictionary
    ALERTNESS definition: 1 the state of being ready to see, understand, and act in a particular situation: 2 the state of… Learn more
  • Alertness - definition of alertness by The Free Dictionary
    To notify of approaching danger or action; warn: a flashing red light that alerted motorists to trouble ahead Watchful and prepared for danger, emergency, or opportunity: bird watchers on the alert for a rare species
  • alertness noun - Definition, pictures, pronunciation and usage notes . . .
    Definition of alertness noun in Oxford Advanced Learner's Dictionary Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more
  • Alertness - Definition, Meaning Synonyms - Vocabulary. com
    "Alertness " Vocabulary com Dictionary, Vocabulary com, https: www vocabulary com dictionary alertness Accessed 12 Jun 2025 Expert-designed, NYT-trusted: Elevate your vocabulary with VocabTrainer! loading examples
  • 15 Ways to Increase Alertness - wikiHow
    To increase alertness, start by getting at least 7 hours of sleep a night if you’re an adult or 8 hours if you’re a teenager, since adequate sleep is critical to alertness Then, eat foods that are high in vitamin B12, like nuts and leafy green vegetables, which are known to increase mental sharpness
  • Alertness Definition Meaning - YourDictionary
    Alertness definition: The quality of being alert or on the alert; briskness; nimbleness; activity
  • What does ALERTNESS mean? - Definitions. net
    Alertness is the state of paying close and continuous attention, being watchful and prompt to meet danger or emergency, or being quick to perceive and act It is related to psychology as well as to physiology
  • APA Dictionary of Psychology
    n the state of being awake, aware, attentive, and prepared to act or react Neurologically, alertness corresponds with high-frequency, low-amplitude brain waves resulting from stimulation of the reticular formation See also arousal —alert adj





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