[ reyn-fawl ]
See synonyms for rainfall on Thesaurus.com
  1. a fall or shower of rain.

  2. the amount of water falling in rain, snow, etc., within a given time and area, usually expressed as a hypothetical depth of coverage: a rainfall of 70 inches a year.

Origin of rainfall

First recorded in 1840–50; rain + fall

Words Nearby rainfall

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use rainfall in a sentence

British Dictionary definitions for rainfall


/ (ˈreɪnˌfɔːl) /

  1. precipitation in the form of raindrops

  2. meteorol the amount of precipitation in a specified place and time

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for rainfall


[ rānfôl′ ]

  1. The quantity of water, usually expressed in millimeters or inches, that is precipitated in liquid form in a specified area and time interval. Rainfall is often considered to include solid precipitation such as snow, hail, and sleet as well.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.