Source : Webster's Revised Unabridged Dictionary (1913)

Manure \Ma*nure"\, v. t. [imp. & p. p. {Manured}; p. pr. & vb.
   n. {Manuring}.] [Contr, from OF. manuvrer, manovrer, to work
   with the hand, to cultivate by manual labor, F. man?uvker.
   See {Manual}, {Ure}, {Opera}, and cf. {Inure}.]
   1. To cultivate by manual labor; to till; hence, to develop
      by culture. [Obs.]

            To whom we gave the strand for to manure. --Surrey.

            Manure thyself then; to thyself be improved; And
            with vain, outward things be no more moved. --Donne.

   2. To apply manure to; to enrich, as land, by the application
      of a fertilizing substance.

            The blood of English shall manure the ground.
                                                  --Shak.

Manure \Ma*nure"\, n.
   Any matter which makes land productive; a fertilizing
   substance, as the contents of stables and barnyards, dung,
   decaying animal or vegetable substances, etc. --Dryden.

Source : WordNet®

manure
     n : any animal or plant material used to fertilize land
         especially animal excreta usually with litter material
     v : spread manure, as for fertilization [syn: {muck}]