Ibn Sa·ud (sä-o?od?) Full name Abdul Aziz bin Abdul Rahman al-Saud. 1880?-1953. Arab leader who was the founder and first king of Saudi Arabia (1932-1953).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.ibn Sa?ud (??b ?n s??ud) n. Abdul-Aziz, 1880?1953, first king of Saudi Arabia 1932?53. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.