Source : Webster's Revised Unabridged Dictionary (1913)

Effuse \Ef*fuse"\, a. [L. effusus, p. p. of effundere to pour
   out; ex + fundere to pour. See {Fuse} to melt.]
   1. Poured out freely; profuse. [Obs.]

            So should our joy be very effuse.     --Barrow.

   2. Disposed to pour out freely; prodigal. [Obs.] --Young.

   3. (Bot.) Spreading loosely, especially on one side; as, an
      effuse inflorescence. --Loudon.

   4. (Zo["o]l.) Having the lips, or edges, of the aperture
      abruptly spreading; -- said of certain shells.

Effuse \Ef*fuse"\, n.
   Effusion; loss. ``Much effuse of blood.'' --Shak.

Effuse \Ef*fuse"\, v. t. [imp. & p. p. {Effused}; p. pr. & vb.
   n. {Effusing}.]
   To pour out like a stream or freely; to cause to exude; to
   shed. [R.]

         With gushing blood effused.              --Milton.

Effuse \Ef*fuse"\, v. i.
   To emanate; to issue. --Thomson.

Source : WordNet®

effuse
     v 1: pour out; "effused brine" [syn: {pour out}]
     2: flow or spill forth [syn: {flow out}]
     3: give out or emit (also metaphorically); "The room effuses
        happiness"