Source : Webster's Revised Unabridged Dictionary (1913)

Lather \Lath"er\, v. t. [imp. & p. p. {Lathered}; p. pr. & vb.
   n. {Lathering}.] [AS. l[=e][eth]rian to lather, anoint. See
   {Lather}, n. ]
   To spread over with lather; as, to lather the face.