The definition of twelfth is something that is preceded by eleven others.(adjective)
If there are 11 people in front of you, this is an example of a time when you are the twelfth.
Twelfth is the one after the eleventh, or is 1/12 of anything that is divided into 12 equal parts.(noun)
If a pie is cut into twelve pieces and you are given one of the pieces, this is an example of when you are given a twelfth.
See twelfth in Webster's New World College Dictionary
Origin: ME twelfthe < OE twelfta: see twelve & -th
See twelfth in American Heritage Dictionary 4
Origin: Middle English twelfthe
Origin: , alteration of Old English twelfta; see dwo- in Indo-European roots.
Learn more about twelfth