adapter

noun

adapt·​er ə-ˈdap-tər How to pronounce adapter (audio)
a-
variants or less commonly adaptor
Synonyms of adapternext
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

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Although there are some lens adapters available, they aren’t guaranteed to work. Bestreviews, Chicago Tribune, 21 Jan. 2026 The cable has a neat clip-on USB-A adapter so the SSD can be used with legacy devices. Mark Sparrow, Forbes.com, 17 Jan. 2026 This compact Bluetooth audio transmitter adapter allows Case to connect her own headphones to the in-flight entertainment system. Chaise Sanders, Travel + Leisure, 16 Jan. 2026 Apart from the PowerBank batteries, the division also sells charging adapters and tech for using the vehicle itself as a backup battery for a home. Robert Ferris, CNBC, 15 Jan. 2026 See All Example Sentences for adapter

Word History

Etymology

adapt + -er entry 2

First Known Use

1753, in the meaning defined at sense 2

Time Traveler
The first known use of adapter was in 1753

Browse Nearby Words

Cite this Entry

“Adapter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/adapter. Accessed 29 Jan. 2026.

Kids Definition

adapter

noun
adapt·​er
variants also adaptor
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
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

More from Merriam-Webster on adapter

Last Updated: - Updated example sentences
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