Ordinal numbers are numbers that show position or order in a sequence. For example, the words first and twentieth are ordinal numbers, as are numerals with suffixes at the end like 1st and 20th.
Define 7th. 7th synonyms, 7th pronunciation, 7th translation, English dictionary definition of 7th. Adj. 1. 7th - coming next after the sixth and just before the eighth in position seventh ordinal - being or denoting a numerical order in a series; "ordinal...