Definition of supersessory in English:
supersessory
(also supercessory)
adjective ˌsuːpəˈsɛsəriˌsjuːpəˈsɛsəri
Having the quality or character of supersession; taking the place of something or someone displaced.
Origin
Late 18th century; earliest use found in The Monthly Review. From classical Latin supersess-, past participial stem of supersedēre supersede + -ory, after supersession.