supersedence

transitive verb superseded, superseding

1. to cause to be set aside or dropped from use as inferior or obsolete and replaced by something else
2. to take the place of in office, function, etc.; succeed
3. to remove or cause to be removed so as to make way for another; supplant

Origin: MFr superseder, to leave off, give over < L supersedere, lit., to sit over, preside over, forbear: see super- & sit