categorist

Noun

categorist (plural categorists)

1. Someone who categorizes.
   • Strictly speaking, Swedenborg’s revelation is a confounding of planes,—a capital offence in so learned a categorist.1850, Ralph Waldo Emerson, “Swedenborg; or, the Mystic”, in Representative Men
   • A man—and for Pinter the male now tends to become the categorist — is baffled by the presence of a filthy old matchseller who stands at the bottom of the lane near his house daily.1971, Walter Kerr, God on the Gymnasium Floor, and Other Theatrical Adventures, page 150

   Synonyms:

   categorizer

2. A mathematician who specializes in category theory.
   • The concept of path of arrows is what the categorist uses instead of the concept of word or string of symbols.1988, Michael Main, Austin Melton, Michael Mislove, Mathematical Foundations of Programming Language Semantics, page 498
   • This mapping is regarded by the categorist as an inclusion, even though in fact it may change what the integer really is.1995, Michael Barr, Charles Wells, Category Theory for Computing Science - Volume 1, page 48