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Also called ordinal numeral. any of the numbers that express degree, quality, or position in a series, as first, second, and third (distinguished from ).
Mathematics. a symbol denoting both the cardinal number and the ordering of a given set, being identical for two ordered sets having elements that can be placed into one-to-one correspondence, the correspondence preserving the order of the elements.
a number denoting relative position in a sequence, such as first, second, third Sometimes shortened to ordinal
(logic, maths) a measure of not only the size of a set but also the order of its elements
ordinal number
A number, such as 3rd, 11th, or 412th, used in counting to indicate position in a series but not quantity. Compare cardinal number.


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  • Ordinance

    [awr-dn-uh ns] /ˈɔr dn əns/ noun 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. Ecclesiastical. /ˈɔːdɪnəns/ noun 1. an authoritative regulation, decree, law, or practice n. […]

  • Ordinand

    [awr-dn-and] /ˈɔr dnˌænd/ noun 1. Ecclesiastical. a candidate for ordination. /ˈɔːdɪˌnænd/ noun 1. (Christianity) a candidate for ordination

  • Ordinariate

    [awr-dn-air-ee-it, -eyt] /ˌɔr dnˈɛər i ɪt, -ˌeɪt/ noun 1. Roman Catholic Church. (formerly) a province in which the faithful of an Eastern rite were under the rule of a prelate of their rite who had no territorial jurisdiction.

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