1. uncountable noun [oft in N]
Someone or something that is in midstream is in the middle of a river, where the current is strongest. ⇒ Their boat had capsized in midstream.
Midstream is also an adverb. ⇒ Some of them got caught midstream by the tide. 2. uncountable noun [oft in N] If someone who has been doing something such as talking stops or pauses in midstream, they stop doing it, often before continuing. ⇒ I was cut off in midstream.
Midstream is also an adverb. ⇒ The most difficult thing in a fast game of rugby is to change course midstream.
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