pigeon pean.1. A shrub (Cajanus cajan) of the pea family, having trifoliolate leaves, yellow to reddish flowers, and small edible seeds, and widely cultivated in tropical regions.2. A seed of this plant.[From the use of its seeds as pigeon feed.]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.pigeon pea n (Plants) another name for dhal Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014pi?geon pea` n. 1. a tropical shrub, Cajanuscajan, of the legume family, with showy yellow flowers. 2. its brown, edible seed. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.