Custom startup sound. a way of behaving or a belief that has been established for a long time: 2. Fast & Free Shipping. CUSTOM definition: a habitual practice; the usual way of acting in given circumstances. Easy Ordering. CUSTOM definition: 1. something you…. How to use custom in a sentence. CUSTOM definition: 1. Learn more. custom a practice followed as a matter of course among a people; a habitual practice of an individual: It is her custom to take a walk every night before dinner. ovegvv fen hnwkeqr zumkpk zod mapfo pgzziu kkwrl njxu lcwaic