n. 1. The setting of the sun; sunset. “When sundown skirts the moor.” Tennyson. [ 1913 Webster ]

2. A kind of broad-brimmed sun hat worn by women. [ 1913 Webster ]

n. A tramp or vagabond in the Australian bush; -- so called from his coming to sheep stations at sunset of ask for supper and a bed, when it is too late to work; -- called also traveler and swagman (but not all swagmen are sundowners).

Sundowners, -- men who loaf about till sunset, and then come in with the demand for unrefusable rations. Francis Adams. [ Webster 1913 Suppl. ]