1. coming after eleven others in order or position

1. the twelfth item in a series
2. one of twelve equal parts of something

Examples

• She finished in twelfth place in the race.
• December is the twelfth month of the year.
• The twelfth chapter discusses climate change.
• He was the twelfth person to arrive at the party.
• She ate one twelfth of the pizza.
• The clock struck twelve on the twelfth day.
• This is my twelfth attempt at solving the puzzle.