a. (Naut.) Built with the stem nearly straight up and down. [ 1913 Webster ]
adj.
a. Having lofty arches. “The high-embowed roof.” Milton. [ 1913 Webster ]
a. Convex; curved outward. “The convex or outbowed side of a vessel.” Bp. Hall. [ 1913 Webster ]
a. Formed with or like a rainbow. [ 1913 Webster ]
a. [ Pref. un- not + bowed. ] Not bent or arched; not bowed down. Byron. [ 1913 Webster ]