Definitions

1. noun

A passage for water to flow from the surface of the ground or a paved area into a sewer, drain, or watercourse.

“The engineer designed a new drainway system to prevent flooding in the city.”

2. noun

A channel or passage for water or liquid to flow out of a surface, especially a paved area.

“The drainway under the sink was clogged and needed to be cleaned.”