Marked by or inclined to waste; extravagant.(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.
Use "wasteful" in a sentence
"Union representatives say the city has yet to do enough to cut what they call wasteful contracts with vendors and find other efficiencies."
"President Obama also faces other challenges from House Republicans, led by the incoming House Speaker John Boehner, who have vowed to cut what they call wasteful government spending."
"Where they differ is on what they define as wasteful spending."