Definitions of rainstorm
  1. noun
    a storm with rain
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    equinoctial storm, line storm
    a violent rainstorm near the time of an equinox
    a short rainstorm accompanied by thunder and lightning
    type of:
    storm, violent storm
    a violent weather condition with winds 64-72 knots (11 on the Beaufort scale) and precipitation and thunder and lightning
    rain, rainfall
    water falling in drops from vapor condensed in the atmosphere
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