-domsuff.1. State; condition: stardom.2. a. Domain; position; rank: dukedom.b. Those that collectively have a specified position, office, or character: officialdom.[Middle English, from Old English -d?m; see dh?- in Indo-European roots.]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.-dom suffix forming nouns 1. state or condition: freedom; martyrdom. 2. rank or office: earldom. 3. domain: kingdom; Christendom. 4. a collection of persons: officialdom. [Old English -d?m]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014dom (d?m; for 2 also Port. d??) n. 1. (sometimes cap.) a title of a monk in certain monastic orders. 2. (usu. cap.) a Portuguese title affixed to a man’s given name; Sir: formerly a title of certain dignitaries. [1710?20; short for Latin dominus lord, master] -dom a suffix forming nouns that refer to domain (kingdom), collection of persons (officialdom), rank or station (earldom), or general condition (freedom). [Middle English; Old English -d?m; c. Old Norse -d?mr, German -tum; see doom] Dom. 1. Dominica. 2. Dominican. dom. 1. domain. 2. domestic. 3. dominant. 4. dominion. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.