The semi monthly meaning can be defined as something that happens twice a month. It is applied in most cases in the payroll where the employees get two payments in a month at set dates, usually the 15 th and the end of the month. This is not the same as biweekly pay, which occurs after every two weeks. This is due to the fact that semi monthly makes the employees more at ease in their financial planning, and also they are well aware of when they can expect their salary.