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English definition of “proficient”

proficient

adjective     /prəˈfɪʃ.ənt/
skilled and experienced : a proficient swimmer She's proficient in two languages . It takes a couple of years of regular driving before you become proficient at it.Skilled, talented and able proficiency     /-ən.si/ noun [U] The job ad said they wanted proficiency in at least two languages .Skill, talent and ability
(Definition of proficient adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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