Meaning of “a snowball effect” in the English Dictionary

british dictionary

"a snowball effect" in British English

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a snowball effect

a situation in which something increases in size or importance at a faster and faster rate:

The more successful you become, the more publicity you get and that publicity generates sales. It's a kind of snowball effect.

(Definition of “a snowball effect” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)