Given to contention; quarrelsome. See Synonyms at argumentative, belligerent.
Involving or likely to cause contention; controversial: "a central and contentious element of the book” ( Tim W. Ferguson).
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.