Pronunciation: (ôr'dn-uns),[key] —n. 1. an authoritative rule or law; a decree or command.
2. a public injunction or regulation: a city ordinance against excessive horn blowing. 3. something believed to have been ordained, as by a deity or destiny.
4. Eccles. a. an established rite or ceremony.
b. a sacrament.
c. the communion.