Origin of backdoor
Examples from the Web for backdoor
Yet, after months of backdoor negotiations there was Xi, stone-facedly shaking hands with a smirking Abe.
In Kafr Kanna, because of the blocked highway exit, The Daily Beast was forced to use a backdoor entry to town.A New Intifada? Israel’s Arab Citizen Uprising Spreads|Creede Newton|November 10, 2014|DAILY BEAST
That's happening thanks to Section 702 of the Foreign Intelligence Survillence Act, the very "backdoor" discussed here.
The defenders of backdoor searches argue that the same rule should apply in the section 702 situation.
That is a typically Russian feature, by banning, they will just awake our interest to find a backdoor.
The last Royalist defender of safe measures had vanished through the backdoor.Lectures on the French Revolution|John Emerich Edward Dalberg-Acton
Probably it had been a servants' entrance, a backdoor, or opening into what are called "the offices" in Scotland.Great Ghost Stories|Various
He went out by the backdoor into the garden, and saw how the sky was clouding up from the south-west.Littlebourne Lock|F. Bayford Harrison
When within a short distance of the old house a backdoor suddenly opened and fule-Tammy came out carrying a peat-keschie.Viking Boys|Jessie Margaret Edmondston Saxby
Early next morning, he tied up his clothes in his handkerchief, crept downstairs noiselessly and let himself out by the backdoor.Babylon, Volume 1 (of 3)|Grant Allen
Word Origin and History for backdoor
also back-door, "devious, shady, illegal," 1640s. The notion is of business done out of public view. The noun back door in the literal sense is from 1520s, from back (adj.) + door. The association with sodomy is at least from 19c.; cf. also back-door man "a married woman's lover," black slang, early 20c.