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first water

(formerly) the highest degree of fineness in a diamond or other precious stone.
Compare water (def 13).
the finest quality; highest rank.
Origin of first water
1745-55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for first water
  • The permits are the plant's first water quality operating permits.
  • The wine region's first water came from an ancient aquifer.
  • When a twenty-first water molecule joins the cage, however, the structure becomes unstable.
  • Seven feet lower, and the first water shortage ever would have been declared in the river's lower basin.
  • During approach for the first water landing at a large nearby pond, he did not notice that the wheels were still extended.
British Dictionary definitions for first water

first water

the finest quality of diamond or other precious stone
the highest grade or best quality
the most extreme kind: a fool of the first water
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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