- The definition of a downpour is a very hard rainfall.
When it starts to rain really really hard, this is an example of a downpour.
A summer downpour.
downpour definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a heavy rain
downpour definition by American Heritage Dictionary
A heavy fall of rain.