Boom means “a deep hollow sound,” “a rapid expansion or increase,” or ” an upsurge in activity, interest, or popularity.”

Boom derives from the Middle English bomben, bummen, and while it can mean any deep hollow sound, we tend to associate it with the sound of an explosion. A boom in business or population, rather than being destructive, is usually a sharp increase of a sudden nature. It’s notable that we use similarly explosive language for other surges of activity, such as when we speak of a meme that “blows up” on social media.


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