Of, relating to, or manifesting behavior that is habitual, maladaptive, and compulsive: a pathological liar. (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 "pathological" in a sentence
"I think that she had what we call pathological envy, meaning she didn ` t want anyone else to be happy but her."
"Then, once they became what he terms pathological gamers, their grades were more likely to drop, and their relationships with their parents deteriorated."
"The claim that she's "pathological" is a reference to Nevada journalist Jon Ralston's tireless efforts to document what he describes as her "pathological" tendency to rewrite history and pretend she never said what she plainly did say."