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English definition of “tomorrow”

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tomorrow

adverb [not gradable]  /təˈmɑr·oʊ, -ˈmɔr-/ us  
on the day after today: He said he’ll call tomorrow after work.

tomorrow

noun [C/U]  /təˈmɑr·oʊ, -ˈmɔr-/ us  
the day after today: [U] Tomorrow’s meeting has been postponed. If you say you will see someone tomorrow morning/night/at noon/etc., you mean you will see that person on the next day at that time: [U] I’ve arranged to see Rachel tomorrow morning/at ten. Tomorrow can also mean the future: [U] Today’s problem child may be tomorrow’s brilliant scientist.
(Definition of tomorrow from the Cambridge Academic Content Dictionary © Cambridge University Press)
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