wasteways

/ˈweɪstˌweɪz/
noun
  1. Plural of wasteway; multiple channels or pipes for carrying away waste or excess water.
    • The wasteways from the industrial park all lead to the treatment facility.
    • The city's wasteways are inspected regularly to prevent blockages.
    • Farmers built wasteways to drain water from their fields.
Synonyms