noun

• (uncountable) The quality of being exceptional.
  "For all their exceptionality, there is also a numbing sameness to the movies of Hayao Miyazaki."
• (countable) A thing, condition, or other matter which is exceptional.
  "We are fain to ask what is to become of Shakespeare and a host of others, who, with equal originality of thought, have avoided those vagrant exceptionalities of humour."
• (education) the condition of requiring special schooling for reasons of intellectual giftedness or physical or mental disability
  "1998, National Joint Committee on Learning Disabilities, "Learning Disabilities: Preservice Preparation of General and Special Education Teachers," Learning Disability Quarterly, vol. 21, no. 3, p. 185, Educators who are earning degrees as learning disability specialists should . . . understand the differences between learning disabilities and other exceptionalities."