What does "drainage system" mean?

pattern formed by the streams, rivers, and lakes in a particular drainage basin

Drainage system

Common synonyms include: ditch network, ditch networks, drain system, drainage, drainage network, drainage well.

noun

noun ·Rare ·Advanced level

Noun

1
pattern formed by the streams, rivers, and lakes in a particular drainage basin
2
a system of watercourses or drains for carrying off excess water wordnet