Definitions

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

  • adj. Showing an alert, competent style: play heads-up basketball.
  • n. Informal Information or notification, especially in advance: gave me the heads-up on the new security measures.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A warning or call to pay attention; an advisory notice.
  • adj. With head directly above the neck, eyes front.
  • adj. Alert; vigilant

from the GNU version of the Collaborative International Dictionary of English

  • adj. maintaining presence of mind; alert and attentive; able to recognize and take quick advantage of opportunities; resourceful.
  • n. a warning to be prepared for an imminent event.

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

  • n. a warning message
  • adj. fully alert and watchful

Etymologies

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