- next after the eightieth; being the ordinal number for 81.
- being one of 81 equal parts.
- an eighty-first part, especially of one (1/81).
- the eighty-first member of a series.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for eighty-first
He died the 4th of February, 1679, in the eighty-first year of his age.
Dr. Mead died on February 16, 1754, in his eighty-first year.A Book about Doctors
John Cordy Jeaffreson
Though nearing his eighty-first birthday, he looked well and strong.Autobiography of a YOGI
He died in his eighty-first year, on the 14th of July, 1714.Curiosities of Human Nature
Old Mrs. Picture had just lived to complete her eighty-first year.When Ghost Meets Ghost
William Frend De Morgan