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Learner's Dictionary
back door
2 ENTRIES FOUND:
backdoor
(adjective)
back door
(noun)
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back door
noun
plural
back doors
back door
noun
plural
back doors
Learner's definition of BACK DOOR
[
count
]
:
a door at the back of a building
—
often used figuratively
He managed to get into the private club
through the back door
[=in a secret or indirect way] because he has a friend who works there.
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