[determiner], [pronoun], [adjective], [adverb] [not gradable], nounSweden was in seventeenth place in the Olympic medal table."When's our next meeting?" "The seventeenth (of October)."Laura was/came seventeenth out of twenty in her class.A seventeenth is one of seventeen equal parts of something.
SEVENTEENTH
Meaning of SEVENTEENTH in English
Cambridge English vocab. Кембриджский английский словарь. 2012