Definition of "fluency"

fluency

/ˈfluːənsi/

noun
countable and uncountable, plural fluencies
1. The quality of smoothness of flow.
  Quotations
  She has fluency, nobility, / Elegance and symmetry, / Stability, fluidity, / Like poetry in motion.
  1996, Vera Morris, Bill Francoeur, A Little Princess: The Musical: Adapted from Frances Hodgson Burnett’s “Sara Crewe”, Denver, Colo.: Pioneer Drama Service, act I, scene i, page 4
2. (linguistics) The quality of being fluent in a language; A person's command of a particular language.
3. The quality of consistently applying skill correctly in the manner of one well-practiced at it, requiring little deliberate thought to perform without mistakes
  Quotations
  While Gunners boss Arsene Wenger had warned his players against letting the pre-match festivities distract them from the task at hand, they clearly struggled for fluency early on.
  2011 December 10, David Ornstein, “Arsenal 1 – 0 Everton”, in BBC Sport‎