The Collaborative International Dictionary of English v.0.48:
Unbowed \Un*bowed"\, a. [Pref. un- not + bowed.] Not bent or arched; not bowed down. --Byron. [1913 Webster]WordNet (r) 3.0 (2006):
unbowed adj 1: erect in posture; "sit straight"; "stood defiantly with unbowed back" [syn: straight, unbent, unbowed] 2: not forced to bow down to a conqueror