- a cardinal number, 80 plus 1.
- a symbol for this number, as 81 or LXXXI.
- a set of this many persons or things.
- amounting to 81 in number.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for eighty-one
Eighty-one may seem old, but her death—by common consensus—was too soon.I Was There: Inside Joan Rivers’ Funeral
September 8, 2014
Eighty-one percent think nonmedical use is “not dangerous at all” or only “slightly dangerous.”7 Things You Need to Know About Adderall
December 2, 2013
Eighty-one years later, the substance produced by the Penicillium notatum fungus is still in wide use as an antibiotic.The 19 Biggest Medical Breakthroughs of the Decade
December 3, 2009
Here he died on the 16th of August, 1821, at the age of eighty-one.A Walk from London to Fulham
Thomas Crofton Croker
He made them eighty-one at first; and then, recounting, made them seventy-nine.Young Mr. Barter's Repentance
David Christie Murray
At that moment a man in the crowd offered a hundred and eighty-one dollars.Tom Swift and his Motor-boat
I'm eighty-one my next birthday—do you breed such fellows now?Lundy's Lane and Other Poems
Duncan Campbell Scott
Seventy-four men, eighty-one women, and fifty-nine children, to be exact?Image of the Gods
Alan Edward Nourse