| backdoor | (noun) a secret or underhand means of access (to a place or a position) | Synonyms: back door |
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| (noun) an entrance at the rear of a building | Synonyms: back door, back entrance |
| (noun) an undocumented way to get access to a computer system or the data it contains | Synonyms: back door |
| barndoor | (noun) an opaque adjustable flap on a lamp fixture; used in photography to cut off light from particular areas | - |
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| door | (noun) a swinging or sliding barrier that will close the entrance to a room or building or vehicle | - |
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| (noun) the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close | Synonyms: doorway, room access, threshold |
| (noun) a room that is entered via a door | - |
| (noun) a structure where people live or work (usually ordered along a street or road) | - |
| (noun) anything providing a means of access (or escape) | - |
| indoor | (adjective) located, suited for, or taking place within a building | - |
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| (adjective) within doors | - |
| outdoor | (adjective) located, suited for, or taking place in the open air | Synonyms: out-of-door, outside |
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| (adjective) pertaining to or concerning the outdoors or outdoor activities | - |
| tandoor | (noun) a clay oven used in northern India and Pakistan | - |
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