/ Dictionary / Index W WMO: Meaning and Definition of Find definitions for: WMO Pronunciation: [key] World Meteorological Organization. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: wmo (Thesaurus) wmk. WNW Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language