ist

noun1

1. •
   A practitioner or supporter of an ism.

   • Not the obsession with the isms and the ists of Balls, Miliband, Cooper and Alexander and their acolytes. — 2009

adjective1

1. •
   Initialism of incompetent to stand trial.

adjective1

1. •
   Abbreviation of first.

   • If each angle were multiplied by three, the eighteen entries of the 1ˢᵗ quadrant would be converted into three groups of six, lying in three quadrants, viz., Iˢᵗ, IIⁿᵈ, IIIʳᵈ — 1907