commemoration
the recital, within the Liturgy of the Hours or the Mass of one celebration, of part of another celebration that is generally of lower rank and impeded because of a coincidence of date.
en-US/kəˌmɛməˈɹeɪʃən/
en-GB/kəˌmɛməˈɹeɪʃn/
the recital, within the Liturgy of the Hours or the Mass of one celebration, of part of another celebration that is generally of lower rank and impeded because of a coincidence of date.