Source : Webster's Revised Unabridged Dictionary (1913)

Breast \Breast\, v. t. [imp. & p. p.{Breasted}; p. pr. & vb. n.
   {Breasting}.]
   To meet, with the breast; to struggle with or oppose
   manfully; as, to breast the storm or waves.

Breasting \Breast"ing\, n. (Mach.)
   The curved channel in which a breast wheel turns. It is
   closely adapted to the curve of the wheel through about a
   quarter of its circumference, and prevents the escape of the
   water until it has spent its force upon the wheel. See
   {Breast wheel}.