The definition of a custom is something that is done regularly or habitually, especially by a particular person or group. It is a practice or tradition that has been established over time, often passed down from generation to generation. Custom is also used to refer to something that is done or made specifically for a particular purpose or person. This could be anything from a unique piece of clothing or jewelry to a unique piece of furniture or artwork. Custom items are often made to order, meaning that they are designed and crafted specifically for the individual who requested them. Custom items are usually more expensive than their mass-produced counterparts, but they are also often of higher quality and more unique. Custom items can also be used to express one’s personality or style, as they are often tailored to the individual’s tastes.