wa ‧ ter ‧ course /ˈwɔːtəkɔːs $ ˈwɒːtərkɔːrs, ˈwɑː-/ BrE AmE noun [countable]
1 . a place where water flows, for example a river or ↑ canal :
chemicals that pollute the local watercourse
2 . a long thin hole for water to flow through
wa ‧ ter ‧ course /ˈwɔːtəkɔːs $ ˈwɒːtərkɔːrs, ˈwɑː-/ BrE AmE noun [countable]
1 . a place where water flows, for example a river or ↑ canal :
chemicals that pollute the local watercourse
2 . a long thin hole for water to flow through
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012