Source : Webster's Revised Unabridged Dictionary (1913)

Prose \Prose\, v. t. [imp. & p. p. {Prosed}; p. pr. & vb. n.
   {Prosing}.]
   1. To write in prose.

   2. To write or repeat in a dull, tedious, or prosy way.

Prosing \Pros"ing\, n.
   Writing prose; speaking or writing in a tedious or prosy
   manner. --Sir W. Scott.