Pronunciation: (nīn'tē-fûrst'), [key]
1. next after the ninetieth; being the ordinal number for 91.
2. being one of 91 equal parts.
1. a ninety-first part, esp. of one (1/91).
2. the ninety-first member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.