名詞 door:

1. a swinging or sliding barrier that will close the entrance to a room or building or vehicle
2. the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
   同義詞：doorway, room access, threshold
3. anything providing a means of access (or escape)
4. a structure where people live or work (usually ordered along a street or road)
5. a room that is entered via a door

1. Our courses are the door to success in English.
   我們的課程是學(xué)習(xí)英語的成功之路。
2. Our other branch is just a few doors down the road.
   沿這條路再走幾家就是我們的另一個分店。
3. The journey takes about an hour, door to door.
   從這家到那家的路程要用一小時。
4. This agreement opens the door to advances in every field.
   這項協(xié)議開啟了各個領(lǐng)域進(jìn)步之門。
5. Who lives next door?
   誰住在隔壁？
6. Diligence is often the door to success.
   勤奮常會引向成功。
7. Open the door, please.
   請把門打開。

door

n.（名詞）

A movable structure used to close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates.
門：一種用于關(guān)閉入口活動裝置，典型的由一塊板上有鉸鏈轉(zhuǎn)動或為拉動式或為旋轉(zhuǎn)式的組合
A similar part on a piece of furniture or a vehicle.
類似門的裝置：車輛或家具上的類似部件
A doorway.
門口：出入口，門道
The room or building to which a door belongs:
戶，間：房間或建筑物的門：
例句：
They live three doors down the hall.
他們住大廳過去的第三間

A means of approach or access:
途徑，方法：到達(dá)或進(jìn)入的途徑：
例句：
looking for the door to success.
尋找成功的途徑

n.attributive.（定語名詞）
Often used to modify another noun:
經(jīng)常用于修飾另一名詞：
例句：
a door chain; a door handle.
門鏈；門把手

v.tr.（及物動詞）
doored,door.ing,doors
Slang To strike (a passing bicyclist, for example) by suddenly opening a vehicular door.
【俚語】 突然撞擊：突然打開車門撞擊（路過騎自行車者等）
To serve as a doorman or doorwoman of (a nightclub, for example).
當(dāng)門衛(wèi)：給（夜總會等）當(dāng)門衛(wèi)

<習(xí)慣用語>at (one`s) door
Within one`s sphere of accountability.
職責(zé)：在某人的責(zé)任范圍之內(nèi)
close the door on 或
shut the door on
To refuse to allow for the possibility of:
拒絕：使沒有可能：
例句：
The secretary of state closed the door on future negotiations.
國務(wù)卿使得即將的談判無法進(jìn)行

leave the door open
To allow for the possibility of:
保留可能性：
例句：
Let`s leave the door open for future stylistic changes.
我們得考慮到將來改變風(fēng)格的可能

show (someone) the door【非正式用語】
To eject (someone) from the premises.
攆出：把（某人）趕出某建筑物
To terminate the employment of; fire.
不再雇傭；解雇
來源：
Middle English dor
中古英語 dor
from Old English duru, dor * see dhwer-
源自 古英語 duru, dor *參見 dhwer-

【引伸】
door.less
adj.（形容詞）