ordinal UK /ˈɔː.dɪ.nəl/US /ˈɔɹ.dɪ.nəl/adjective 3noun 3forms 1 adjective3 •Indicating position in a sequence."Three" is a cardinal number, while "third" is the corresponding ordinal number. •Pertaining to a taxon at the rank of order. •Intercardinal. noun3 •An ordinal number such as first, second and third.The most common numerals in Latin, as in English, are the "cardinals"[…]and the "ordinals"[…] — 2005 •A unique serial number assigned to a satoshi based on its position in the blockchain. •A book used in the ordination of Anglican ministers, or in certain Roman Catholic services formsordinals