supersession Meaning, Definition & Usage

  1. noun act of replacing one person or thing by another especially one held to be superior
    supersedure.

WordNet

Su`per*ses"sion noun
Etymology
Cf. OF. supersession. See Supersede.
Definitions
  1. The act of superseding, or the state of being superseded; supersedure.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.

Webster 1913