adapter

noun

adapt·​er ə-ˈdap-tər 

a-

variants or less commonly adaptor

1

: one that adapts

2

a

: a device for connecting two parts (as of different diameters) of an apparatus

b

: an attachment for adapting apparatus for uses not originally intended

Synonyms of adapter

• accessory
• option
• appliance

Examples of adapter in a Sentence

adapters for the food mixer include a meat grinder and an ice cream maker

Recent Examples on the Web

According to the company, the adapters are easy to snap in and out without tools or glue, so the whole system can be rebuilt in different configurations. — Maryna Holovnova, New Atlas, 10 Aug. 2026

As with most travel adapters, it isn't designed for high-current heating appliances like curling irons or hair dryers. — Mark Sparrow, Forbes.com, 9 Aug. 2026

And with this universal adapter compatible with over 200 countries, a few hours to kill in an international airport gets a little easier. — Lara Kramer, Condé Nast Traveler, 8 Aug. 2026

This audio transmitter adapter eliminates that need by creating a wireless connection between your Bluetooth earbuds and your seatback TV. — Jasmine Gomez, Travel + Leisure, 5 Aug. 2026

Word History

Etymology

adapt + -er entry 2

First Known Use

1753, in the meaning defined at sense 2

Rhymes for adapter

• adaptor
• subchapter
• apter
• captor
• chapter
• raptor

Kids Definition

adapter

noun

adapt·​er

variants also adaptor

ə-ˈdap-tər 

1

: someone or something that adapts

2

a

: a device for connecting two parts (as of different diameters) of a usually larger device

b

: an attachment for adapting a device for uses not originally intended

Medical Definition

adapter

noun

adapt·​er

variants also adaptor

ə-ˈdap-tər 

1

: one that adapts

2

a

: a device for connecting two parts (as of different diameters) of an apparatus

b

: an attachment for adapting apparatus for uses not originally intended