position 11 in a countable series of things
"She took the eleventh spot in the marathon, finishing just behind the runner who came in tenth."
The person or thing in the eleventh position.
"She finished as the eleventh runner across the finish line, just behind the medalists but ahead of the rest of the pack."
The ordinal form of the number eleven.
"She was born on the eleventh day of February, making her birthday in the middle of winter."
The word "eleventh" comes from Middle English, formed by adding the suffix "-th" to "eleven." This newer form replaced older inherited versions that traced back to Old English and Proto-Germanic roots.