down·come \ˈdau̇nˌkəm\noun (-s) Etymology: Middle English (Scots) douncome, from Middle English doun down + come action of coming, alteration (influenced by comen to come) of kime, from Old English cyme, from cuman to come — more at down, come 1.archaic: a coming down : descent : sudden fall : downfall : overthrow 2.: downcomer a