Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. alertness, vigilance or wakefulness

from The Century Dictionary and Cyclopedia

  • n. The state or character of being watchful, in any sense.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. vigilant attentiveness
  • n. the process of paying close and continuous attention

Etymologies

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