1st or 2nd type of number?

• Kind of number
• Uproar during exam leads to third for one
• Like first, second, or third
• First, second, or third, e.g.
• Number used as a street name
• 21st, e.g.

Wiktionary Word definitions in Wiktionary
a. 1 Of a number, indicating position in a sequence. 2 (context taxonomy English) Of or relating to the groupings called orders. n. 1 An ordinal number such as first, second and third. 2 A book used in the ordination of Anglican ministers, or in certain ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ordinal \Or"di*nal\, n. A word or number denoting order or succession. (Ch. of Eng.) The book of forms for making, ordaining, and consecrating bishops, priests, and deacons. (R. C. Ch.) A book containing the rubrics of the Mass.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
late 14c., "regular, ordinary," from Old French ordinel and directly from Late Latin ordinalis ""showing order, denoting an order of succession," from Latin ordo (genitive ordinis ) "row, series" (see order (n.)). Meaning "marking position in an order or ...