Meaning of SNOWBALL in English

I. noun Date: 15th century 1. a round mass of snow pressed or rolled together, snow cone , any of several cultivated shrubby viburnums (genus Viburnum ) with clusters of white sterile flowers, II. verb Date: 1843 intransitive verb to engage in throwing ~s, to increase, accumulate, expand, or multiply at a rapidly accelerating rate, transitive verb to throw ~s at, to cause to increase or multiply at a rapidly accelerating rate

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.