Having no flaws; perfect. See Synonyms at perfect.(adjective)
Incapable of sin or wrongdoing.(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 "impeccable" in a sentence
"The list continued to intrigue me, and I began to read about the piece, which does indeed appear to be an essay, written in impeccable academic style."
"However, his move to Juventus, who are the early leaders in Serie A, appears to have reinvigorated one of the classiest midfielders around and during Friday's draw against Serbia, his performance was labelled "impeccable" by Gazzetta Dello Sport, who also named him man of the match."
"His voting record has been impeccable from a conservative point of view."