Definition of water main
: a pipe or conduit for conveying water
Examples of water main in a sentence
The water main burst and flooded the street.
First Known Use of water main
WATER MAIN Defined for English Language Learners
Definition of water main for English Language Learners
: a large underground pipe that carries water
Seen and Heard
What made you want to look up water main? Please tell us where you read or heard it (including the quote, if possible).