/ Dictionary / Index N NM: Meaning and Definition of Find definitions for: NM Pronunciation: [key] New Mexico (approved esp. for use with zip code). noun modifier. nm Pronunciation: [key] nanometer; nanometers. nautical mile. nonmetallic. N.M. Pronunciation: [key] New Mexico. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nm (Thesaurus) NLRB NMI 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