EXTERNALITY /ekstəˈnælɪti/ Scrabble 21 Words With Friends 22 Definition noun the quality or state of being outside or directed toward or relating to the outside or exterior. — synonyms: outwardness Examples “Waste is a negative externality arising from consumption.” See all 486 words you can make from EXTERNALITY → 11-letter words Words starting with E Words ending with Y ← Unscramble different letters