[determiner], [pronoun], [adjective], [adverb] [not gradable], nounthe twelfth volumethe twelfth floorDecember is the twelfth month.I'll see you on the twelfth (of June).He was/came twelfth in his class.Six twelfths are a half.(UK and ANZ) The twelfth man in a cricket team is a reserve (= extra player).Twelfth Night is the sixth of January, twelve days after Christmas.
TWELFTH
Meaning of TWELFTH in English
Cambridge English vocab. Кембриджский английский словарь. 2012