Source : Webster's Revised Unabridged Dictionary (1913)

Immediacy \Im*me"di*a*cy\, n.
   The relation of freedom from the interventionof a medium;
   immediateness. --Shak.

Source : WordNet®

immediacy
     n 1: lack of an intervening or mediating agency; "the immediacy
          of television coverage" [syn: {immediateness}] [ant: {mediacy}]
     2: immediate intuitive awareness [syn: {immediate apprehension}]
     3: the quickness of action or occurrence; "the immediacy of
        their response"; "the instancy of modern communication"
        [syn: {immediateness}, {instantaneousness}, {instancy}]