WordReference Random House Unabridged Dictionary of American English © 2026
first′ wa′ter, 
    1. Jewelry(formerly) the highest degree of fineness in a diamond or other precious stone. Cf. water (def. 13).
    2. the finest quality;
      highest rank.
    • 1745–55

Collins Concise English Dictionary © HarperCollins Publishers::
first water n
  1. the finest quality of diamond or other precious stone
  2. the highest grade or best quality
'first water' also found in these entries (note: many are not synonyms or translations):
water

Forum discussions with the word(s) "first water" in the title:


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