good officespl.n. Services done for another, especially when done as a mediator.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.good? of?fices n.pl. 1. services rendered, esp. by someone in an influential position. 2. services rendered by a mediator in a dispute. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.