Source : Webster's Revised Unabridged Dictionary (1913)

Manifestation \Man`i*fes*ta"tion\, n. [L. manifestatio: cf. F.
   manifestation.]
   The act of manifesting or disclosing, or the state of being
   manifested; discovery to the eye or to the understanding;
   also, that which manifests; exhibition; display; revelation;
   as, the manifestation of God's power in creation.

         The secret manner in which acts of mercy ought to be
         performed, requires this public manifestation of them
         at the great day.                        --Atterbury.

Source : WordNet®

manifestation
     n 1: a clear appearance; "a manifestation of great emotion"
     2: a manifest indication of the existence or presence or nature
        of some person or thing; "a manifestation of disease"
     3: an appearance in bodily form (as of a disembodied spirit)
        [syn: {materialization}, {materialisation}]
     4: expression without words; "tears are an expression of
        grief"; "the pulse is a reflection of the heart's
        condition" [syn: {expression}, {reflection}, {reflexion}]
     5: a public display of group feelings (usually of a political
        nature); "there were violent demonstrations against the
        war" [syn: {demonstration}]