ordinal number
Concise Oxford English Dictionary © 2008 Oxford University Press:
ordinal number
▶noun a number defining a thing's position in a series, such as ‘first’ or ‘second’.
'ordinal number' also found in these Oxford entries:
billion
- cardinal number
- eighteen
- eighth
- eighty
- eleventh
- fifteen
- fifth
- fifty
- first
- forty
- fourteen
- fourth
- grade
- hundred
- million
- nineteen
- ninety
- ninth
- ordinal
- quadrillion
- quintillion
- second
- seventh
- seventy
- sextillion
- sixteen
- sixth
- sixty
- tenth
- third
- thirteen
- thirty
- thousand
- trillion
- twelfth
- twenty
- umpteen
- zillion
