Definition of drainage

"Drainage" has a direct connection to the Old French word "dreiner," meaning "to drain." This word itself stems from the Latin "drenāre," meaning "to draw off water." The concept of drainage, the process of removing excess water, has existed for centuries, as evident in ancient irrigation systems. The English word "drainage" first appeared in the 16th century, reflecting the growing importance of controlling water for agriculture, sanitation, and infrastructure.