SUNDOWN
sunset, sundown
(noun) the time in the evening at which the sun begins to fall below the horizon
Source: WordNet® 3.1
Etymology
Noun
sundown (countable and uncountable, plural sundowns)
(US) Sunset.
(countable) A hat with a wide brim to shade the eyes from sunlight.
Synonyms
• dusk, mirkning, nightfall; see also dusk
Verb
sundown (third-person singular simple present sundowns, present participle sundowning, simple past and past participle sundowned)
(intransitive) to experience an episode or an onset of some detrimental mental condition like agitation, anxiety, hallucination or dementia, daily at nightfall.
Source: Wiktionary
Sun"down`, n.
1. The setting of the sun; sunset. "When sundown skirts the moor."
Tennyson.
2. A kind of broad-brimmed sun hat worn by women.
Source: Webster’s Unabridged Dictionary 1913 Edition