[mare] n [ME, fr. OE; akin to OHG mara incubus, Serbo-Croatian mora nightmare] (bef. 12c) obs: an evil preternatural being causing nightmares
[2]mare n [ME, fr. OE mere; akin to OHG merha mare, OE mearh horse, W march] (bef. 12c): a female horse or other equine animal esp. when fully mature or of breeding age [3]ma.re n, pl ma.ria also ma.res [NL, fr. L, sea--more at marine] (1860): any of several mostly flat dark areas of considerable extent on the surface of the moon or Mars