1. coming after ten others in a sequence; being number 11 in order

1. the person or thing that is number 11 in a sequence
2. one of eleven equal parts of something

Examples

• She finished in eleventh place in the race.
• This is my eleventh attempt at solving the puzzle.
• The eleventh chapter discusses climate change.
• He was the eleventh person to arrive at the party.
• She ate one eleventh of the pizza.
• The meeting is scheduled for the eleventh of March.
• My birthday falls on the eleventh day of the month.