MIM Meaning of MIM in English /mim/ , adj. Brit. Dial.primly modest or demure. [ 1670-80; perh. b. MUM 1 and PRIM ] /meem/ , n.the twenty-fourth letter of the Arabic alphabet. [ ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012