ordinal Meaning, Definition & Usage

  1. noun the number designating place in an ordered sequence
    no.; ordinal number.
  2. adjective of or relating to a taxonomic order
    • family and ordinal names of animals and plants
  3. adjective being or denoting a numerical order in a series
    • ordinal numbers
    • held an ordinal rank of seventh

WordNet

Or"di*nal adjective
Etymology
L. ordinalis, fr. ordo, ordinis, order. See Order.
Definitions
  1. Indicating order or succession; as, the ordinal numbers, first, second, third, etc.
  2. Of or pertaining to an order.
Or"di*nal noun
Definitions
  1. A word or number denoting order or succession.
  2. (Ch. of Eng.) The book of forms for making, ordaining, and consecrating bishops, priests, and deacons.
  3. (R. C. Ch.) A book containing the rubrics of the Mass. Written also ordinale.

Webster 1913