1. instream - Noun
2. instream - Verb
instream (third-person singular simple present instreams, present participle instreaming, simple past and past participle instreamed)
(intransitive) To flow or stream in; flow or stream into.
The act or process of streaming or flowing in.
That which flows in.
Source: en.wiktionary.orgLast week, C. Wayne Ives, P.G., Hydrogeologist, Instream Flow Specialist, Watershed Management Bureau sent out an email under the title “Hello Lamprey River Affected Water Users (and other interested parties)”. Source: Internet