Thoroughgoing; unequivocal: a downright lie. (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 "downright" in a sentence
""Dat's what I calls downright robbery, Kun'l," he exclaimed, highly incensed."
"Even when I introduced them in the most delicate way, he was what I call downright rude."
"Men are better judges of that than women; but for high, chivalrous spirit, for true principle and nobility, and what I call downright worth, I don't think you will easily find her superior."