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

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

The adapter supports 4K resolution at 120 frames per second with HDR (though the console only supports 60Hz at 4K), or 1440p and 1080p at up to 120 frames per second. —Cameron Faulkner, The Verge, 28 May 2026

This specification has forced anyone using HDMI to connect their displays to buy additional adapters for a dual-monitor setup. —Mark Sparrow, Forbes.com, 27 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