General Definition: 1. Something of this general shape (an arc or a hemisphere) lying on a flat surface, or any thing or any action directly or indirectly associated with this, especially a lump on the body. As a Noun: 1. A small, hard piece of flesh that is formed on someone's body as a result of an injury or an illness. English = lump. 2. A swollen shape on your body which is there as a result of a blow. English = bump.