Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “adapter”


noun [C] (DEVICE) (also adaptor)     /əˈdæp.tər/ US  /-tɚ/
mainly UK a type of plug that makes it possible to connect two or more pieces of equipment to the same electrical supply Electrical switches and connections a device that is used to connect two pieces of equipment Electrical switches and connections
(Definition of adapter noun (DEVICE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of adapter

More definitions for “adapter”

Definitions of “adapter” in other dictionaries

Word of the Day


relating to behaviour between people that is pleasant and friendly, often despite a difficult situation

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More