Source : Webster's Revised Unabridged Dictionary (1913)

Cloudless \Cloud"less\, a.
   Without a cloud; clear; bright.

         A cloudless winter sky.                  --Bankroft.
   -- {Cloud"less*ly}, adv. -- {Cloud"less*ness}, n.

Source : WordNet®

cloudless
     adj : free from clouds; "under a cloudless sky" [syn: {unclouded}]