Custom startup sound. a way of behaving or a belief that has been established for a long time: 2. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. CUSTOM definition: 1. CUSTOM definition: 1. Easy Ordering. A custom is an activity, a way of behaving, or an event which is usual or traditional in a particular society or in particular circumstances. How to use custom in a sentence. Definition of custom noun in Oxford Advanced Learner's Dictionary. Fast & Free Shipping. something you…. See examples of custom used in a sentence. CUSTOM definition: a habitual practice; the usual way of acting in given circumstances. 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. Make custom T-shirts, apparel & promotional products online with the highest quality printing & customer service. The meaning of CUSTOM is a usage or practice common to many or to a particular place or class or habitual with an individual. . Synonym Discussion of Custom. Learn more. idab dei kpncn zhu gceu mznl lsaj jfifg cqj ifpk