Lying; untruthful: a mendacious child. (adjective)
False; untrue: a mendacious statement. See Synonyms at dishonest.(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 "mendacious" in a sentence
"The bigger the unit you deal with, the hollower, the more brutal, the more mendacious is the life displayed."
"The suggestion that 40 million people died because of the power of words might seem trite until one recalls the mendacious blabberings of the leaders of a war we are still fighting."
"Perhaps the term 'mendacious' could be added to Romanus's list."