The American Heritage® Dictionary of the English Language, 4th Edition
n. 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).
the GNU version of the Collaborative International Dictionary of English
n. recklessness in politics or foreign affairs.
The Century Dictionary and Cyclopedia
n. The ways, habits, and schemes of the adventurer or adventuress; the practices, pretenses, or experiences of those who live by their wits.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. recklessness in politics or foreign affairs
Word Usage
"There would be much less "adventurism" around the world, he said."