Supersession

su·per·sede  (spr-sd)

tr.v. su·per·sed·ed, su·per·sed·ing, su·per·sedes

1. To take the place of; replace.

2. To cause to be set aside, especially to displace as inferior or antiquated. See Synonyms at replace.

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[Middle English superceden, to postpone, from Old French superceder, from Latin supersedre, to refrain from : super-, super- + sedre, to sit; see sed- in Indo-European roots.]

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super·seder n.

super·session (-sshn) n.

Thesaurus

Noun

1.

supersession - act of replacing one person or thing by another especially one held to be superior supersedure replacement, replacing - the act of furnishing an equivalent person or thing in the place of another; "replacing the star will not be easy"