Meaning of “breakout” in the English Dictionary

"breakout" in Business English

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breakoutnoun [ C ]

uk /ˈbreɪkaʊt/ us

an increase, especially a sudden one:

With little change in the stock market, the long-hoped-for breakout still appears to be a few weeks away.
We are hoping for a major breakout in profits later this year.

US →  breakdown

breakoutadjective [ before noun ]

uk /ˈbreɪkaʊt/ us

very successful, especially when compared to something else:

They described 2008 as a breakout year for European technology firms.

relating to a meeting of one or more small groups that are part of a larger group:

The CEO gave a speech in the morning, and breakout sessions followed in the afternoon.
The conference centre has eight break-out rooms.

(Definition of “breakout” from the Cambridge Business English Dictionary © Cambridge University Press)