alertness
Roget's Thesaurus:
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alertness
noun
- The condition of being alert: vigilance, wakefulness, wariness, watchfulness. See awareness/unawareness.
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Awareness of environmental stimuli and the ability to respond quickly to those stimuli. Alertness is reflected by an increase in electrical activity of the reticular formation and cerebral cortex in the brain.
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Roget's Thesaurus
Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 byHoughton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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