/ Dictionary / Index N nervous Nellie: Meaning and Definition of Find definitions for: nerv'ous Nel'lie Pronunciation: [key] — Informal. Informal. a constantly nervous, worried, or timid person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nervous exhaustion nervous system Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language