Source : Webster's Revised Unabridged Dictionary (1913)

Brill \Brill\, n. [Cf. Corn. brilli mackerel, fr. brith
   streaked, speckled.] (Zo["o]l.)
   A fish allied to the turbot ({Rhombus levis}), much esteemed
   in England for food; -- called also {bret}, {pearl}, {prill}.
   See {Bret}.

Source : WordNet®

brill
     n : European food fish [syn: {Scophthalmus rhombus}]