Twelfth
WordNet
adjective
(1) Coming next after the eleventh and just before the thirteenth in position
noun
(2) One part in twelve equal parts
(3) Position 12 in a countable series of things
WiktionaryText
Numeral
- The ordinal form of the number twelve, describing a person or thing in position number 12 of a sequence.
- The answer appears on the twelfth page of the book.
- She finished twelfth in the race.
Usage notes
English ordinal numbers may function as either an adjective or as a noun, and almost never appear in the plural.