Supersession
Pronunciation : Su`per*ses"sion
Part of Speech : n.
Etymology : [Cf. OF. supersession. See Supersede.]
Definition : Defn: The act of superseding, or the state of being superseded; supersedure. The general law of diminishing return from land would have undergone, to that extent, a temporary supersession. J. S. Mill.
Source : Webster's Unabridged Dictionary, 1913