In set theory, an ordinal number, or ordinal, is a generalization of ordinal numerals (first, second, n th, etc.) aimed to extend enumeration to infinite sets. [1] A finite set can be enumerated by successively …

Ordinal [Middle English, from Medieval Latin ordinale, from Late Latin, neuter of ordinalis] : a book of rites for the ordination of deacons, priests, and bishops

ORDINAL definition: 1. a number such as 1st, 2nd, 3rd, 4th, that shows the position of something in a list of things…. Learn more.

ORDINAL definition: of or relating to an order, as of animals or plants. See examples of ordinal used in a sentence.

2025年7月23日 · Ordinal Numbers are numbers that are used to represent position, rank or order in a sequence. They denote the position or order of an element in a sequence, such as "1st - first," "2nd - …

2025年4月30日 · Ordinal numbers show position or order, like first, second, and third. Ordinal numbers end with -nd, -rd, -st, or -th, such as 2nd, 3rd, and 1st. When using ordinal and cardinal numbers …

2025年12月22日 · In formal set theory, an ordinal number (sometimes simply called an "ordinal" for short) is one of the numbers in Georg Cantor's extension of the whole numbers. An ordinal number is …

Definition of ordinal noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

An ordinal number is a number that indicates the position or order of something in relation to other numbers, like, first, second, third, and so on. This order or sequence may be according to the size, …

Colloquially, an ordinal number is a number that tells the position of something in a list, such as first, second, third, etc. This basic understanding extends to the meaning of ordinal numbers in set theory.