Meanings
nounfirst sleep (plural first sleeps)
plural first sleeps
- Synonym of dead sleep (“the first sleep of the night in a biphasic sleep pattern, before the watch”)
Synonyms: dead sleep
Synonyms & antonyms
nounSynonym of dead sleep (“the first sleep of the night in a biphasic sleep pattern, before the watch”)
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Cite this entry
APA
first sleep. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/first%20sleep
MLA
“first sleep.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/first%20sleep. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “first sleep,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/first%20sleep.
Source: first sleep on Wiktionary, CC BY-SA 4.0.