The Collaborative International Dictionary of English v.0.48:

Emanation \Em`a*na"tion\, n. [L. emanatio: cf. F. ['e]manation.]
   1. The act of flowing or proceeding from a fountain head or
      origin. --South.
      [1913 Webster]

            Those profitable and excellent emanations from God.
                                                  --Jer. Taylor.
      [1913 Webster]

   2. That which issues, flows, or proceeds from any object as a
      source; efflux; an effluence; as, perfume is an emanation
      from a flower.
      [1913 Webster]

            An emanation of the indwelling life.  --Bryant.
      [1913 Webster]

WordNet (r) 3.0 (2006):

emanation
    n 1: something that is emitted or radiated (as a gas or an odor
         or a light, etc.)
    2: the act of emitting; causing to flow forth [syn: emission,
       emanation]
    3: (theology) the origination of the Holy Spirit at Pentecost;
       "the emanation of the Holy Spirit"; "the rising of the Holy
       Ghost"; "the doctrine of the procession of the Holy Spirit
       from the Father and the Son" [syn: emanation, rise,
       procession]