1) Of or relating to an order, as of animals or plants.
M.E., from O.Fr., from L.L. ordinalis "denoting order or place in a series," from L. ordo (genitive ordinis) "row, series," → order; → -al.
Fr.: nombre ordinal
1) A number which defines the position or rank of something in a series, in contrast to
→ cardinal number. For example, first,
second, tenth, etc.