Secret or surreptitious; clandestine: a backdoor romance. (adjective)
Sports Of or directed toward a player who has slipped behind the opposing defense: a backdoor pass. (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 "backdoor" in a sentence
"Kind of brings new meaning to the term backdoor pass."
"We have got what we call a backdoor cold front which is dropping through the region."
"Simon Derrick, of Bank of New York Mellon, said the move was fuelling speculation that Beijing was involved in backdoor deals with the US administration to nudge its currency upwards."