a. A movable structure used to close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates.
b. A similar part on a piece of furniture or a vehicle.
2. A doorway.
3. The room or building to which a door belongs:They live three doors down the hall.
4. A means of approach or access:looking for the door to success.
tr.v.doored, door·ing, doorsIdioms:
1. Slang To strike (a passing bicyclist, for example) by suddenly opening a vehicular door.
2. To serve as a doorman or doorwoman of (a nightclub, for example).
at (someone's) door
As a charge holding someone responsible:You shouldn't lay the blame for the fiasco at her door.
close/shutthe door on
To refuse to allow for the possibility of:The secretary of state closed the door on future negotiations.
leave the door open
To allow for the possibility of:Let's leave the door open for future stylistic changes.
show (someone) the doorInformal
1. To eject (someone) from the premises.
2. To terminate the employment of; fire.
[Middle Englishdor, fromOld Englishduru, dor; see dhwer- in the Appendix of Indo-European roots.]
(click for a larger image)door
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.