alertness 

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n. alerting��on the qui vive��vigilance��wakefulness

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1. "O yes, certainly, " said the girl with a sort of demure alertness which was somewhat amusing.
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2. When this energy is properly applied, the meditator stays constantly in a state of calm and alertness.
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3. She said music was more effective than silence, conversation or talk radio in achieving an optimal state of alertness.
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n.
  1. the process of paying close and continuous attention
  2. a state of readiness to respond
  3. lively attentiveness

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alertness
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relaxed alertness
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Entrepreneurial alertness
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sports alertness
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heightened alertness
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