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[pruh-fish-uh n-see] /prəˈfɪʃ ən si/
the state of being proficient; skill; expertness:
proficiency in music.
Origin of proficiency
1535-45; < Latin prōfici(ēns) proficient + -ency
Related forms
overproficiency, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for proficiency
Contemporary Examples
Historical Examples
  • As to his proficiency at study there was not much to be said.

    Biographical Stories Nathaniel Hawthorne
  • There are all degrees of proficiency in knowledge of the world.

    Essays, First Series Ralph Waldo Emerson
  • Should musical degrees be granted, and if so, for what measure of knowledge or proficiency?

    College Teaching Paul Klapper
  • It may be well imagined, then, that his proficiency was not very great.

  • The naturalist also must acquire some measure of proficiency in the ancient art.

    Boy Scouts Handbook Boy Scouts of America
  • His belief was that his proficiency in singlestick62 was matched only by his skill in song.

    My Reminiscences Rabindranath Tagore
Word Origin and History for proficiency

1540s, probably from -cy + Latin proficientem (nominative proficiens), present participle of proficere "accomplish, make progress; be useful, do good; have success, profit," from pro- "forward" (see pro-) + root of facere "to make" (see factitious).

Online Etymology Dictionary, © 2010 Douglas Harper
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