WordReference Random House Learner's Dictionary of American English © 2026
ˈwa•ter ˌmain, n. [countable]
  1. Civil Engineeringa main pipe for conveying water.

WordReference Random House Unabridged Dictionary of American English © 2026
wa′ter main′, 
  1. Civil Engineeringa main pipe or conduit in a system for conveying water.
  • 1795–1805

Collins Concise English Dictionary © HarperCollins Publishers::
water main
  1. a principal supply pipe in an arrangement of pipes for distributing water
'water main' also found in these entries (note: many are not synonyms or translations):
hydrant

Forum discussions with the word(s) "water main" in the title:


Look up "water main" at Merriam-Webster
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