first water
noun
(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
First recorded in 1745–55
Words nearby first water
Example sentences from the Web for first water
Yet they were constantly after him, for they knew they were likely to get a first-water gem.
Mark Twain, A Biography, 1835-1910, Complete |Albert Bigelow PaineAn expert would have known immediately that it was a first-water product of an expert gunsmith.
The Black Wolf Pack |Dan BeardShe was got up expensive, all real lace and first-water sparks, and just as handsome as a towel rack.
Shorty McCabe |Sewell Ford
British Dictionary definitions for first water
first water
noun
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