From Longman Dictionary of Contemporary Englishdreamlessdream‧less /ˈdriːmləs/ adjective SLEEPdreamless sleep is very deep and peaceful
Examples from the Corpus
dreamless• Her sleep had been deep and dreamless.• Wonderful dreamless sleep engulfed him every night.• Eight hours of deep, dreamless sleep had helped enormously.• Everything his heart needed, even dreamless sleep, she would be able to give him.• After a while he dozed, and then slid into a dreamless sleep.• In the circle of Edward's arm she fell into a dreamless sleep.• She gently turned Omi's pillow to stop her mild snoring and then drifted off into her own dreamless sleep.• There are plans to make for tomorrow, but for now I want a dreamless sleep. 