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Word History First Known Use 1723, in the meaning defined at transitive sense 1 Time Traveler The first known use of boil down was in 1723 See more words from the same year Dictionary Entries Near boil down boil disease boil down Boileau-Despréaux See More Nearby Entries ...
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The meaning of BOIL DOWN is to reduce in bulk by boiling. How to use boil down in a sentence.