Pronunciation:\r\n \\ˈmə-zən\\\r\n1 a: a child of one's aunt or uncle on your mothers side b: a relative descended from one's grandparent or more remote ancestor by two or more steps and in a different line on the mothers side.\n> "I have 2 mousin's and one fousin." = I have 2 cousin's on my moms side and one cousin on my fathers side.\n