The Collaborative International Dictionary of English v.0.48:
Masterless \Mas"ter*less\, a. Destitute of a master or owner; ungoverned or ungovernable. -- Mas"ter*less*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
masterless adj 1: having no lord or master; "harsh punishments for sturdy vagabonds and masterless men" [syn: lordless, masterless]