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Entry 4 senses · 3 variants Webster, 1913

Panic

/păn'-ĭk/ · Pan·ic · IPA /ˈpænɪk/
01 n. A plant of the genus Panicum; panic grass; also, the edible grain of some species of panic grass.
  1. 1.
    A plant of the genus Panicum; panic grass; also, the edible grain of some species of panic grass.(Bot.)
Phrases & compounds
Panic grass — any grass of the genus Panicum.
02 a. Extreme or sudden and causeless; unreasonable; -- said of fear or fright; as, panic fear, terror, alarm.
  1. 1.
    Extreme or sudden and causeless; unreasonable; -- said of fear or fright; as, panic fear, terror, alarm.
03 n. A sudden, overpowering fright; esp., a sudden and groundless fright; terror inspired by a trifling cause or a misapprehension of danger; as…
  1. 1.
    A sudden, overpowering fright; esp., a sudden and groundless fright; terror inspired by a trifling cause or a misapprehension of danger; as, the troops were seized with a panic; they fled in a panic.
  2. 2.
    By extension: A sudden widespread fright or apprehension concerning financial affairs.