follow Dictionary.com

Submit your word to be a Word of the Day!

adapter

[uh-dap-ter] /əˈdæp tər/
noun
1.
a person or thing that adapts.
2.
  1. a connector for joining parts or devices having different sizes, designs, etc., enabling them to be fitted or to work together.
  2. Also called plug adapter, adapter plug. a device that connects an electrical plug to an outlet that has a different plug shape:
    Last time I traveled, I brought the wrong adapter.
  3. Also called AC adapter, power adapter. a device with a cord that plugs into an electrical outlet and functions as an external power supply for a small or portable electronic device, usually converting AC current to DC:
    I forgot to plug in the adapter, and my laptop died.
3.
an accessory to convert a machine, tool, or part to a new or modified use.
4.
Computers.
  1. expansion card.
  2. an external device containing the necessary circuitry to connect to or work with another device or system:
    a network adapter; a wireless adapter; a video adapter.
Also, adaptor.
Origin
1795-1805
1795-1805; adapt + -er1
Related forms
nonadapter, nonadaptor, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Word Origin and History for power-adapter

adapter

n.

1801, agent noun from adapt. Electrical engineering sense from 1907.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
power-adapter in Medicine

adapter a·dapt·er or a·dap·tor (ə-dāp'tər)
n.

  1. One that adapts.

  2. A connecting part that joins two pieces of apparatus.

  3. A converter of electric current to a desired form.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for adapter

Many English speakers likely know this word

Word Value for power

10
11
Scrabble Words With Friends

Quotes with power-adapter