Ba·hi·a grass or Ba·hi·a·grass (b?-h??? gr?s?)n. A perennial grass (Paspalum notatum) of tropical and subtropical America, cultivated for forage, turf, and erosion control.[After Bahia (Salvador), Brazil.]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.Ba?hi?a grass` (b??hi ?) n. a lawn and pasturage grass, Paspalum notatum, native to tropical America. [1925?30; after Bahia (state)] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.