bird peppern. See chiltepin.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.bird pepper n 1. (Plants) a tropical solanaceous plant, Capsicum frutescens, thought to be the ancestor of the sweet pepper and many hot peppers 2. (Plants) the narrow podlike hot-tasting fruit of this plant Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014bird? pep`per n. a variety of pepper, Capsicum anuum glabriusculum, having small, elongated berries. [1780?90] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.