Phrase guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
Any amount of free time to sleep or rest.
Definition source: English Wiktionary via Wiktextract
Usage: informal, uncountable
Synonyms: none provided
Antonyms: none provided
History
Most probably coined in the military. Compare rack, a nautical term for a bunk bed.
