Relating to or characteristic of an adversary; involving antagonistic elements: "the chasm between management and labor in this country, an often needlessly adversarial . . . atmosphere” ( Steve Lohr).
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.