down ‧ stream /ˌdaʊnˈstriːm◂/ BrE AmE adverb
in the direction that the water in a river or stream is flowing OPP upstream ⇨ downriver :
a boat drifting downstream
down ‧ stream /ˌdaʊnˈstriːm◂/ BrE AmE adverb
in the direction that the water in a river or stream is flowing OPP upstream ⇨ downriver :
a boat drifting downstream
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012