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Ordinary grade
ordinary interest
Ordinary level
ordinary rate
ordinary shares
ordinate
ordination
ordn.
ordnance
ordnance datum
Ordnance Survey
ordo
ordonnance
Ordovician
ordure
Ore.
ore
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ordinal number

or·di·nal num·ber (plural or·di·nal num·bers)


noun 
Definition:
 
1. number showing order: a number used to show the relative position of somebody or something in a sequence, e.g. "first," "sixth," or "29th"

2. size and order of set: a measure of the size of an ordered set

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