Dictionary.com
Thesaurus.com
Synonyms

proficient

American  
[pruh-fish-uhnt] / prəˈfɪʃ ənt /

adjective

  1. well-advanced or competent in any art, science, or subject; skilled.

    a proficient swimmer.

    Synonyms:
    accomplished, experienced, competent, adept, finished, able
    Antonyms:
    inept, unskilled

noun

  1. an expert.

proficient British  
/ prəˈfɪʃənt /

adjective

  1. having great facility (in an art, occupation, etc); skilled

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. an archaic word for an expert

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • overproficient adjective
  • proficiency noun
  • proficiently adverb
  • proficientness noun
  • underproficient adjective

Etymology

Origin of proficient

First recorded in 1580–90; from Latin prōficient-, stem of prōficiēns, present participle of prōficere “to advance, make progress,” equivalent to prō- pro- 1 + -ficere, combining form of facere “to make, do”; do, efficient

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

One major consequence of the last four years of war is that Ukraine and Russia are now the most experienced and proficient practitioners of drone warfare in the world.

From BBC

She said she went out on her e-bike to "become more proficient".

From BBC

More than half of high-school grads matriculate to college, even though only 35% of 12th graders score proficient in reading and 22% in math on the National Assessment of Educational Progress.

From The Wall Street Journal

He’s equally proficient on clarinet, providing intermittent solos of captivating beauty.

From The Wall Street Journal

Law-enforcement officers at the same time have been taking commercial drivers off the road who are deemed not to be proficient in English.

From The Wall Street Journal