The Collaborative International Dictionary of English v.0.48:
Viewless \View"less\, a. Not perceivable by the eye; invisible; unseen. "Viewless winds." --Shak. [1913 Webster] Swift through the valves the visionary fair Repassed, and viewless mixed with common air. --Pope. [1913 Webster] ViewlyWordNet (r) 3.0 (2006):
viewless adj 1: not having or expressing opinions or views