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Definition of "sleep" []

  • A natural periodic state of rest for the mind and body, in which the eyes usually close and consciousness is completely or partially lost, so that there is a decrease in bodily movement and responsiveness to external stimuli. During sleep the brain in humans and other mammals undergoes a characteristic cycle of brain-wave activity that includes intervals of dreaming. (noun)
  • A period of this form of rest. (noun)
  • A state of inactivity resembling or suggesting sleep; unconsciousness, dormancy, hibernation, or death. (noun)
  • Botany The folding together of leaflets or petals at night or in the absence of light. (noun)
  • A crust of dried tears or mucus normally forming around the inner rim of the eye during sleep. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "sleep" in a sentence
  • "Wake up… brush teeth… shower… breakfast… school [sleep] … come home… watch t. v… do homework… here my parents argue… eat dinner…. watch t. v…. finish homework… sleep…"
  • "_A_ may go to sleep quicker than _B_, but cannot _do more sleep_ in a given time."
  • ""I want sleep child," said Miss Webster, "I want _sleep_, leave me alone.""