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

SpaceX is developing the prototype to be capable of refueling midflight in a complex process that requires two Starships equipped with docking adapters to meet in orbit to transfer propellant. —Eric Lagatta, USA Today, 23 May 2026

The Steam Controller comes pre-packaged with its magnetic charging puck, which doubles as the wireless adapter that extends the controller’s range across the room. —Beth Mole, ArsTechnica, 22 May 2026

Handy amenities include toothbrushes, (glass) bottled sparkling and still water, and built-in worldwide plug adapters. —Condé Nast, Condé Nast Traveler, 19 May 2026

In the development and growth phase, your role is that of an adapter. —Rodney C. Adkins, Forbes.com, 19 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