Definition of "careless" []

• Taking insufficient care; negligent: a careless housekeeper; careless proofreading. (adjective)
• Marked by or resulting from lack of forethought or thoroughness: a careless mistake. (adjective)
• Showing a lack of consideration: a careless remark. (adjective)
• Unconcerned or indifferent; heedless: careless of the consequences. (adjective)
• Unstudied or effortless: danced with careless grace. (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.

• "Geithner apologized for what he called careless mistakes."
• "Police blame the incident on what they call careless zoo keepers."
• "Police blame the incident on what they call careless zookeepers."