Meaning of “proficient” in the English Dictionary

"proficient" in British English

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proficientadjective

uk /prəˈfɪʃ.ənt/ us /prəˈfɪʃ.ənt/

(Definition of “proficient” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"proficient" in American English

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proficientadjective

us /prəˈfɪʃ·ənt/

skilled and experienced:

a proficient swimmer
He studied Chinese and became proficient in the language.
proficiency
noun [ U ] us /prəˈfɪʃ·ən·si/

Morgan has great proficiency as a jazz saxophonist.

(Definition of “proficient” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"proficient" in Business English

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proficientadjective

uk /prəˈfɪʃənt/ us

very skilled and experienced at something:

proficient at sth/doing sth Consumers have become more proficient at shopping online.
proficient in sth The government will help small businesses become proficient in the technologies they need to compete in the digital marketplace.

(Definition of “proficient” from the Cambridge Business English Dictionary © Cambridge University Press)