Dictionary
sun•down
Pronunciation: (sun'doun"), [key]—
n.
sunset, esp. the time of sunset.
—
v.i.
Psychiatry.to experience confusion or hallucinations at night as a result of strange surroundings, drug effects, decreased sensory input, or reduction of oxygen supply to the brain.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.