Characterized by or inclined to neglect, especially habitually.(adjective)
Characterized by careless ease or informality; casual.(adjective)
Law Guilty of negligence.(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 "negligent" in a sentence
"An outrage, they say, because they believe that ever since Beslan, the Russian government has done everything it could to try and cover up its -- what they call negligent handling of the crisis."
"John McCain on Rove: It depends on what the definition of "negligent" is by on"
"Whether BP (and/or its contractors) were criminally negligent is the subject of a Justice Department investigation."