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English definition of “automatic”

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automatic

adjective  /ˌɔ·t̬əˈmæt̬·ɪk/ us  

automatic adjective (INDEPENDENT)

able to operate independently of human control: The car has a five-speed automatic transmission.

automatic adjective (NOT CONSCIOUS)

(of an action) done without thinking about it: Soon enough, taking her pill every morning became automatic.

automatic adjective (CERTAIN)

happening according to rules that are certain to be followed, and therefore not needing a decision: Citizenship is automatic for children born in the US. People on Social Security get automatic cost-of-living increases each year.
(Definition of automatic from the Cambridge Academic Content Dictionary © Cambridge University Press)
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