/ Dictionary / Index T tropical disturbance: Meaning and Definition of Find definitions for: trop'ical disturb'ance Pronunciation: [key] — Meteorol. Meteorol. a very weak, or incipient, tropical cyclone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tropical cyclone tropical fish Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language