adjective, windier, windiest. \taccompanied or characterized by wind : a windy day. 2. exposed to or swept by the wind : a windy hill. 3. consisting of or resembling wind : a windy tempest of activity. 4. toward the wind; windward. 5. unsubstantial or empty. 6. of the nature of, characterized by, or given to prolonged, empty talk;voluble; verbose; bombastic. 7. characterized by "oneClick-link">or causing flatulence.