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Formerly practicioner for *practicianer, from practician + -er (the suffix unnecessarily added, as in musicianer).



practitioner (plural practitioners)

  1. A person who practices a profession or art, especially law or medicine.
    • 2014 June 21, "Magician's brain", in The Economist, volume 411, number 8892:
      The [Isaac] Newton that emerges from the [unpublished] manuscripts is far from the popular image of a rational practitioner of cold and pure reason. The architect of modern science was himself not very modern. He was obsessed with alchemy.
  2. One who does anything customarily or habitually.
  3. (dated) A sly or artful person.
    • John Whitgift
      [...] the men of St. John's were cunning practitioners, in shaking off their Masters and Heads.

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