Definition of "ordinal" in English

adjective

1. (mathematics, of a number) Indicating position in a sequence.

   • "Three" is a cardinal number, while "third" is the corresponding ordinal number.

2. (taxonomy) Pertaining to a taxon at the rank of order.

3. (nautical) Intercardinal.

noun

1. An ordinal number such as first, second and third.

2. A book used in the ordination of Anglican ministers, or in certain Roman Catholic services

3. (cryptocurrencies) A unique serial number assigned to a satoshi based on its position in the blockchain.