noun Date: 1607 a number designating the place (as first, second, or third) occupied by an item in an ordered sequence, a number assigned to an ordered set that designates both the order of its elements and its cardinal number
ORDINAL NUMBER
Meaning of ORDINAL NUMBER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012