stream

1 stream /ˈstriːm/ noun
plural streams
1 stream
/ˈstriːm/
noun
plural streams
Britannica Dictionary definition of STREAM
[count]
1 
: a natural flow of water that is smaller than a river
— compare river
2 
: any flow of liquid or gas — often + of
— see also bloodstream, jet stream, slipstream
3 
: a continuous flow of people or things — usually + of
4 
British : 1track 8

on stream

chiefly British
: in or into a working or functioning state : in or into operation
2 stream /ˈstriːm/ verb
streams; streamed; streaming
2 stream
/ˈstriːm/
verb
streams; streamed; streaming
Britannica Dictionary definition of STREAM
1 
always followed by an adverb or preposition, [no object] : to move in a steady flow
2 
of the body or a body part
a  : to produce a liquid continuously and often in large amounts
[no object]
— usually + with
[+ object]
b  [no object] : to be or become wet with a liquid
3 
always followed by an adverb or preposition, [no object] : to come or flow continuously to a place in large numbers
4 
[no object] : to move freely in one direction especially in wind or water
5 
[+ object] British : to group students in a particular grade according to their abilities and needs : track