Definition of alternating current noun from the Oxford Advanced Learner's Dictionary


alternating current

BrE BrE//ˌɔːltəneɪtɪŋ ˈkʌrənt//
; NAmE NAmE//ˌɔːltərneɪtɪŋ ˈkɜːrənt//
[uncountable, countable] (abbreviation AC)
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an electric current that changes its direction at regular intervals many times a second compare direct current
See the Oxford Advanced American Dictionary entry: alternating current