barefaced lie

The Virgin and the Gipsyを読んでいます。それにしても牧師の家だというのに母親代わりのGranny及びAunt Cissieと姉妹の二人の関係は余り良くありません。
"At least," said Granny, "we don't come of half-depraved stock."
There was a second's electric pause. Then Lucille sprang from her low seat, with sparks flying from her.
"You shut up!" she shouted, in a blast full upon the mottled majesty of the old lady.
The old woman's breast began to heave with heaven knows what emotions. The pause this time, as after the thunderbolt, was icy.
Then Aunt Cissie, livid, sprang upon Lucille, pushing her like a fury.
"Go to your room!" she cried hoarsely. "Go to your room!"
（中略）
'Of course not. I only said we're not depraved, just because we happen to be superstitious about breaking mirros.'
Yvette could hardly believe her ears. Had she heard right? Was it possible! Or was Granny, at her age, just telling a barefaced lie?
Yvette knew that the old woman was telling a cool, barefaced lie. But already, so quickly, Granny believed her own statement.
"barefaced lie" とはどんな嘘を指すのでしょうか？
・Merriam-Webster's Online Dictionary: having or showing a lack of scruples: a barefaced lie
・Macmillan Dictionary: used for emphasizing that someone who does something bad is not ashamed or does not try to do it secretly: a barefaced lie
・Cambridge English Dictionary: not trying to hide your bad behaviour: That's a barefaced lie!
多くの辞書に "barefaced" の例として上記の様に "barefaced lie" を載せていました。
見え透いたずうずうしい嘘と言うことでしょうか。