chiefly US
: extremely fine: such as
a
: extremely thin
superfine wire
b
: made up of extremely small pieces
superfine sugar
c
: of very high quality
superfine wool
Cite this Entry
“Superfine.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/superfine. Accessed 14 Apr. 2026.
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