delayed sleep phase disorder

noun

A circadian rhythm sleep disorder in which the subject falls asleep some hours after midnight and has difficulty waking up in the morning.

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Meanings

noundelayed sleep phase disorder (countable and uncountable, plural delayed sleep phase disorders)

plural delayed sleep phase disorders

  1. countableuncountableA circadian rhythm sleep disorder in which the subject falls asleep some hours after midnight and has difficulty waking up in the morning.

Synonyms & antonyms

Also see
delayed sleep phase syndrome
Cite this entry
APA

delayed sleep phase disorder. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/delayed%20sleep%20phase%20disorder

MLA

“delayed sleep phase disorder.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/delayed%20sleep%20phase%20disorder. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “delayed sleep phase disorder,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/delayed%20sleep%20phase%20disorder.

Source: delayed sleep phase disorder on Wiktionary, CC BY-SA 4.0.