Pronunciation: ( —adv.on'strēm', ôn'-; —adj.on'strēm", ôn'-),[key] —adv. in or into regular operation, esp. as part of a system, assembly line, or the like: When the new printing press goes on-stream, we'll be able to print twice as many newspapers a day.
—adj. operating on a regular basis or at full capacity: on-stream production.