4 entries under idiom topic. ×

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time to hit the hay(noun, expression, slumbertime)
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time to hit the sack(noun, expression, slumbertime)
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time to retire(noun, expression, bedtime, slumbertime)
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time to turn in(noun, expression, slumbertime)
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APASmart Define. (2015). lights out thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/lights_out/thesaurus/synonyms
ChicagoSmart Define. 2015. "lights out thesaurus" https://smartdefine.org/lights_out/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, lights out thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/lights_out/thesaurus/synonyms>.
MLASmart Define. "lights out thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/lights_out/thesaurus/synonyms>