Ndong·o (?n-dông?g?)n. pl. Ndongo or Ndong·os See Mbundu.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.Mbun?du (?b?n du, ?m?b?n-) n., pl. -dus, (esp. collectively) -du. 1. a. a member of an African people or group of peoples of N Angola. b. the Bantu language of the Mbundu. 2. Ovimbundu. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.