Hit, struck, or bumped something hard and noisily; or made a loud explosive sound.
From Old Norse 'banga' meaning to hammer or strike. Related to bang as a noun for a loud sound. Became common in English around the 1600s.
Bang is one of those perfect onomatopoeia words—it actually sounds like what it means, which is why it's been used to describe explosions and impacts for centuries across many languages.
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