Idioms and Phrases with dead to the world
dead to the world
Sound asleep or unconscious, as in The alarm clock went off but Joseph was dead to the world. [Late 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.