/ Dictionary / Index E ecohazard: Meaning and Definition of Find definitions for: ec•o•haz•ard Pronunciation: (ek'ō-haz"urd, ē'kō-), [key] — n. any substance or activity that poses a threat to a habitat or an environment: Off-the-road motorcycling is an ecohazard to fragile desert habitats. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ecofreak ecol. Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language