Panic

1. a. By extension: A sudden widespread fright or apprehension concerning financial affairs.
2. n. A plant of the genus Panicum; panic grass; also, the edible grain of some species of panic grass.
3. a. Extreme or sudden and causeless; unreasonable; — said of fear or fright; as, panic fear, terror, alarm.
4. a. 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.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.