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preposition

1
used as a function word to indicate extension as far as a specified place
sank up to his knees in the mud
2
used as a function word to indicate a limit or boundary
up to 50,000 copies a monthworked up to the last minute

Word History

First Known Use

13th century, in the meaning defined at sense 1

Time Traveler
The first known use of up to was in the 13th century

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