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

There are a handful of absolutely necessary travel items on sale like a toiletry bag that conveniently hangs to see all your toiletries at once for just $21 or a universal power adapter that works in over 200 countries and is on sale for $23. —Erin Cavoto, Travel + Leisure, 16 May 2026

The complex process requires two Starships equipped with docking adapters to meet in orbit to transfer hundreds of tons of super-cooled propellant. —Eric Lagatta, USA Today, 13 May 2026

Once the spacecraft was close to Earth, the crew module separated from the European Service Module and the crew module adapter, allowing for splashdown in the Pacific Ocean. —Chelsea Gohd, Space.com, 8 May 2026

This set also offers a vegan leather cover to protect the device and a 9-watt power adapter. —Bestreviews, Chicago Tribune, 4 May 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