a pipe for conveying rain water from a roof or gutter to the ground or to a drain.
Origin of downspout
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US and Canadian a pipe for carrying rainwater from a roof gutter to the ground or to a drainAlso called: drainpipe, (in Britain and certain other countries) downpipe
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
Online Etymology Dictionary, © 2010 Douglas Harper