Learn how to say Down-Stream correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word downstream:
adverb /daʊnˈstriːm/ & adjective /ˈdaʊnstriːm/
situated or moving in the direction in which a stream or river flows:
the bridge spanned the river just downstream of the rail line
deforestation could have disastrous consequences for downstream regions
Biology situated in or towards the part of a sequence of genetic material where transcription takes place later than at a given point:
a termination signal was found downstream from the coding region
at a stage in the process of gas or oil extraction and production after the raw material is ready for refining.