Storm drain

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    An access point or conduit for rainwater that drains directly downstream in a (drainage) basin without passing through sewers or water treatment in order to prevent or belay floods. US
  2. 2
    a system of watercourses or drains for carrying off excess water wordnet

Etymology

An allusion to their usefulness in catching stormwater and therefore preventing floods.