A subsidiary entrance to a building or house at its rear, normally away from the street. / A means of access, often secret and unprotected, to something.

(US, baseball) The path of a pitch which starts outside and then slides over the plate. / Achieved through indirect means.

To attempt to accomplish by indirect means, especially when direct means are proscribed.

plural of back door

present participle of back door

simple past tense and past participle of back door

(rare) A man, chiefly a homosexual, who has anal sex.

plural of gentleman of the back door

plural of back-door pilot

(film, television) A film, miniseries, or episode that serves as a proof of concept for a new full television series, but may be broadcast on its own even if the full series does not come to fruition.