Involvement in risky enterprises without regard to proper procedures and possible consequences, especially the reckless intervention by a nation in the affairs of another nation or region: "American strategic interests would . . . be even more jeopardized by Soviet adventurism in the Middle East” ( Christopher T. Rand).
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.