1. (noun)twelfth position 12 in a countable series of things Synonyms: one-twelfth, twelfth part, duodecimal Antonyms: cardinal
2. (adj)one-twelfth, twelfth, twelfth part, duodecimal one part in twelve equal parts Synonyms: twelfth, one-twelfth, twelfth part, duodecimal Antonyms: cardinal
3. (adj)twelfth, 12th coming next after the eleventh and just before the thirteenth in position Synonyms: twelfth Antonyms: cardinal