Ordinal numeral

Cardinal versus ordinal numbers
Cardinal one two three four
1 2 3 4
Ordinal first second third fourth
1st 2nd 3rd 4th

In linguistics, ordinal numerals or ordinal number words are words representing position or rank in a sequential order; the order may be of size, importance, chronology, and so on (e.g., "third", "tertiary"). They differ from cardinal numerals, which represent quantity (e.g., "three") and other types of numerals.