American English

Definition of snowball verb from the Oxford Advanced American Dictionary



[intransitive]Verb Forms present simple I / you / we / they snowball
he / she / it snowballs
past simple snowballed
-ing form snowballing
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if a problem, a plan, an activity, etc. snowballs, it quickly becomes much bigger, more serious, more important, etc. Opposition to the proposals has snowballed.
See the Oxford Advanced Learner's Dictionary entry: snowball