Of or pertaining to two or more political parties. (adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "cross-party" in a sentence
"Spending cuts will prevent the armed forces from carrying out military operations and lead to a decline in Britain's influence and role in the world, a hard-hitting report by a cross-party group of MPs warns."
"Bob Diamond being questioned by the cross-party Treasury select committee during its hearing into competition and choice in British banking."
"In the post-war period, the only stuff that got through the Congressional meat-grinder was with cross-party coalitions."