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Related to ordinal number: cardinal number
A number indicating position in a series or order. The ordinal numbers are first (1st), second (2nd), third (3rd), and so on.
1. (Mathematics) a number denoting relative position in a sequence, such as first, second, third. Sometimes shortened to: ordinal
2. (Logic) logic maths a measure of not only the size of a set but also the order of its elements
any of the numbers that express degree, quality, or position in a series, as first, second, and third.
A number, such as 3rd, 11th, or 412th, used in counting to indicate position in a series but not quantity. Compare cardinal number.
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|Noun||1.||ordinal number - the number designating place in an ordered sequence|
number - a concept of quantity involving zero and units; "every number has a unique position in the sequence"