door
Americannoun
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doors
plural
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a movable, usually solid, barrier for opening and closing an entranceway, cupboard, cabinet, or the like, commonly turning on hinges or sliding in grooves.
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a doorway.
to go through the door.
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the building, house, etc., to which a door belongs.
My friend lives two doors down the street.
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any means of approach, admittance, or access.
the doors to learning.
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any gateway marking an entrance or exit from one place or state to another.
at heaven's door.
idioms
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lay at someone's door, to hold someone accountable for; blame; impute.
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leave the door open, to allow the possibility of accommodation or change; be open to reconsideration.
The boss rejected our idea but left the door open for discussing it again next year.
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lie at someone's door, to be the responsibility of; be imputable to.
One's mistakes often lie at one's own door.
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show someone the door, to request or order someone to leave; dismiss.
She resented his remark and showed him the door.
noun
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a hinged or sliding panel for closing the entrance to a room, cupboard, etc
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( in combination )
doorbell
doorknob
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a doorway or entrance to a room or building
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a means of access or escape
a door to success
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informal sport at an early stage
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to lay (the blame or responsibility) on someone
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in or into the open air
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to order someone to leave
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of door
First recorded before 900; Middle English dore, Old English duru “door,” dor “gate”; akin to German Tür, Old Norse dyrr, Greek thýra, Latin foris, Old Irish dorus, Old Chursh Slavonic dvĭrĭ
Explanation
A door is a moving structure that when closed acts as a barrier to a room, house, building, or car. You'll have to open the door to let your dog come inside. Buildings have doors, and so do most vehicles. You might also have a special little door built into your own back door for your cat. Doors act as security, as they can be closed and locked, and also as ventilation when you open the door to let the spring air in. Being "out of doors" means you're outside, beyond all the doors of your house or building.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
They'd been knocking on the door for three seasons, under different managers, before he arrived; second, third and second in the three campaigns prior to his elevation from coaching at underage level.
From BBC ● Aug. 17, 2026
The discovery could open the door to a different way of treating cancer.
From Science Daily ● Aug. 17, 2026
Section 301 has also opened the door to new country-specific tariffs targeted at Brazil, at 25%, while Section 338 was cited to slap an extra 50% import tax on certain Canadian goods.
From Salon ● Aug. 16, 2026
The billionaire entrepreneur Fernando De Leon says he was shown the door as an analyst at Goldman Sachs, and took it as a sign that he wasn’t meant to answer to anyone.
From The Wall Street Journal ● Aug. 15, 2026
The week before, two blocks over, Ms. Hardy’s door was also spray-painted.
From "Split the Sky" by Marie Arnold
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"All the window and doors have melted and everything has gone," she said.
From BBC ● Aug. 16, 2026
A mother of one living near one of the military camps that were hit told AFP the strikes shook the windows and doors like a quake.
From Barron's ● Aug. 16, 2026
Ricci went viral for taking viewers behind the closed doors of his family’s quarterly money meetings, all the way down to agendas.
From The Wall Street Journal ● Aug. 15, 2026
The ground floor features an open great room with a wood-paneled ceiling and a wall of bifold glass doors, which open to a landscaped conversation area.
From MarketWatch ● Aug. 14, 2026
He rattled around in the house and kept trying to walk out through the windows and glass doors, so we let him outside and kept his food dish full and left him untied.
From "Woodsong" by Gary Paulsen
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.