- next after the eighty-third; being the ordinal number for 84.
- being one of 84 equal parts.
- an eighty-fourth part, especially of one (1/84).
- the eighty-fourth member of a series.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for eighty-fourth
December 29, 1893, Mr. Gladstone attained the eighty-fourth year of his age.The Grand Old Man
Richard B. Cook
Though he lived to his eighty-fourth year, Voltaire was born with a weak body.Letters on England
But to return to my own case: I am in my eighty-fourth year.Treatises on Friendship and Old Age
Marcus Tullius Cicero
The venerable Lucretia Mott, then in her eighty-fourth year, presided.
Dupanloup speaks of the Prince celebrating his eighty-fourth birthday on that date.Talleyrand