/ Dictionary / Index N National Labor Relations Act: Meaning and Definition of Find definitions for: Na'tional La'bor Rela'tions Act" Pronunciation: [key] an act of Congress (1935) that forbade any interference by employers with the formation and operation of labor unions. Also calledCf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nationalize National Labor Relations Board Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language