I. ˈ ̷ ̷| ̷ ̷ noun
Etymology: mid (I) + stream
1.
a. : the portion of a stream well removed from both sides
keep the boat in midstream
the political axiom of not changing horses in midstream
b. : the center line of a stream : a line of which the course is midway or what is considered to be midway between the sides of a stream
the midstream is the boundary
2. : the portion of a stream well removed from both source and mouth
in the midstream of his career — Arthur Berger
in midstream both as writer and in his profession — R.C.Beatty
II. adverb
: in midstream