JAIN Meaning of JAIN in English /juyn/ , n.1. an adherent of Jainism. adj.2. of or pertaining to the Jains or Jainism. Also, Jaina /juy"neuh/ , Jainist . [ 1795-1805; jaina ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012