Definitions

1. noun

the number twelve; one-twelfth of a year, especially the festival of twelfth night

“The family celebrated the twelfth night of Christmas with a festive dinner.”

2. adjective

coming after the eleventh in a series

“He was the twelfth player to join the team this season.”

3. adverb

to the twelfth degree or extent

“The city was affected by the twelfth degree of flooding.”