|< 80th||81st||82nd >|
| Cardinal : eighty-one|
Ordinal : eighty-first
- (ordinal) The ordinal form of the number eighty-one, describing a person or thing in position number 81 of a sequence.
- The answer appears on the eighty-first page of the book.
- She finished eighty-first in the race.
English ordinal numbers may function as either an adjective or as a noun, and almost never appear in the plural.
- 81st, 81st
ordinal number 81st
eighty-first (plural eighty-firsts)