English dictionary zonk out meaning and definition Definition and meaning of zonk out at MeaningMonkey.org. zonk out meaning and definition in the English Dictionary. ZONK OUT verbDefinition of zonk out (verb)lose consciousness due to a sudden trauma, for examplesynonyms: black out, pass outfall asleep fast, as when one is extremely tired"after the long drive, we zonked out and slept for 10 hours" Source: Princeton University Wordnet
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