Dictionary.com
Thesaurus.com

barn swallow

American  

noun

  1. a common swallow, Hirundo rustica, of North America and Eurasia, that nests in barns and similar buildings.

barn swallow British  

noun

  1. the US and Canadian name for the common swallow, Hirundo rustica See swallow 2

"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

Etymology

Origin of barn swallow

An Americanism dating back to 1780–90

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.