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

• accessory
• option

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

Its director, and franchise mastermind, Rian Johnson has proven himself a master of the whodunnit form with these films, showing a knack for Agatha Christie puzzle-plotting that, well, the actual adapters of Christie haven’t shown in recent years. —Christian Blauvelt, IndieWire, 8 Sep. 2025

According to Samsung, the FE 25 contains a 4,900mAh battery capable of reaching a 65% charge in 30 minutes with a 45W adapter. —Iyaz Akhtar, PC Magazine, 4 Sep. 2025

Owners of non-Tesla models are also accessing Tesla stations by carrying adapters, and vice versa. —IEEE Spectrum, 2 Sep. 2025

Cordless hair tools were once a boon for travelers, with their portable, bulk-free designs that didn't require a special adapter when visiting overseas. —Olivia Young, Travel + Leisure, 28 Aug. 2025

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