D defs.my
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Entry 2 senses · 2 variants Webster, 1913

heads-up

· IPA /hˈɛdzˌʌp/
01 adj. maintaining presence of mind; alert and attentive; able to recognize and take quick advantage of opportunities; resourceful; as, he played …
  1. 1.
    maintaining presence of mind; alert and attentive; able to recognize and take quick advantage of opportunities; resourceful; as, he played good heads-up baseball.
Syn. wide-awake.
02 n. a warning to be prepared for an imminent event.
  1. 1.
    a warning to be prepared for an imminent event.