Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having keen eyesight.
  • adj. Keenly perceptive or observant; alert.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Attentive, given to noticing things, aware.
  • adj. Having acute vision, having good eyesight.

from The Century Dictionary and Cyclopedia

  • Sharp-sighted.

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

  • adj. having keen eyesight
  • adj. having very keen vision
  • adj. keenly perceptive or alert

Etymologies

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