/ Dictionary / Index N NLRB: Meaning and Definition of Find definitions for: NLRB Pronunciation: [key] National Labor Relations Board. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nlrb (Thesaurus) N.L.F. NM Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language