midstream

mid- +‎ stream

midstream (usually uncountable, plural midstreams)

1. The middle of a stream or river.

• change horses in midstream
• swap horses in midstream

midstream (not comparable)

1. in midstream, abruptly
   • 2018 January 19, Matt Katz, “Leaving Africa, and Living in Limbo”, in The New York Times‎, →ISSN:

     But it was in the middle of this process that he had met Ms. Lukoji, and he opted not to change his application midstream to take his marriage into account.

   • 2020 November 19, Natasha Frost, “Covid-19, Boris Johnson, U.S. Troops: Your Thursday Briefing”, in The New York Times‎, →ISSN:

     Unlike film, theater and TV, the book world didn’t get interrupted midstream.