ˈsənˌdau̇n noun
( -s )
Etymology: probably alteration of sun going down, from Middle English sonne goyng downe
1. : the time the sun disappears for the night
visitors are asked to leave at sundown — Frederick Nebel
they would be back … about sundown — Ellen Glasgow
2. : a broad-brimmed hat for women
3. : a light yellowish brown that is redder, lighter, and stronger than khaki or walnut brown and lighter, stronger, and slightly redder than cinnamon