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

Great for international and domestic trips alike, this mighty wall plug adapter—which is currently on sale for $23—has four different plugs that are compatible with outlets in over 150 countries. —Amelia McBride, Travel + Leisure, 6 Jan. 2026

Rechargeable lanterns often include an AC adapter for plugging them into an electrical outlet. —Bestreviews, Chicago Tribune, 6 Jan. 2026

The toolkit that keeps you productive Hardware Good laptop, noise-cancelling headphones, portable hotspot, universal adapters. —Taylor Haught, Sacbee.com, 5 Jan. 2026

Turbo also offers a €20 adapter for use with induction cooktops. —New Atlas, 18 Dec. 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