Definition of "operative" []

• Being in effect; having force; operating: "Two major tendencies are operative in the American political system” ( Heinz Eulau). (adjective)
• Functioning effectively; efficient. (adjective)
• Engaged in or concerned with physical or mechanical activity. (adjective)
• Of, relating to, or resulting from a surgical operation. (adjective)
• Significant; most important; key: The operative word is "low-fat.” (adjective)

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.

• "Charlie Crist Jr., who, according to one McCain operative, is the other candidate — besides Jindal — who McCain is seriously considering tapping as his running mate."
• "Deposada, a GOP operative from the failed Bush Presidency, crossed a critical line this week by developing and placing ads urging Latino voters to stay home and not vote during this important election cycle."
• "Robert Deposada, a GOP operative from the failed Bush Presidency, has crossed a critical line this week by developing and placing ads urging Latino voters to stay home and not vote during this important election cycle."