MARE

I. noun Etymology: Middle English, from Old English; akin to Old High German mara incubus, Serbo-Croatian mora night~ Date: before 12th century an evil preternatural being causing night~s, II. noun Etymology: Middle English, from Old English mere; akin to Old High German merha ~, Old English mearh horse, Welsh march Date: before 12th century a female horse or other equine animal especially when fully mature or of breeding age, III. noun (plural maria; also ~s) see: marine Date: 1860 any of several mostly flat dark areas of considerable extent on the surface of the moon or Mars