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

Paul Feig is returning to direct the sequel, working from a script by The Housemaid adapter Rebecca Sonnenshine, based on the second novel in McFadden’s bestselling thriller trilogy. —Matt Grobar, Deadline, 11 June 2026

This will send a Starship—which is unlikely to be modified with more than a docking adapter—into orbit. —Eric Berger, ArsTechnica, 9 June 2026

This compact adapter from Satechi keeps all your devices connected in one place. —Jasmine Gomez, Travel + Leisure, 6 June 2026

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, 28 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