Definition
A lump is a compact, solid mass of something, typically without a regular shape. Imagine a lump of coal or a lump of sugar. It suggests a somewhat irregular and undefined form. 'Lump' can also refer to a swelling under the skin. It indicates a localized mass that deviates from the surrounding tissue. The term can also express a figurative sense of heaviness or burden. Think of a 'lump in your throat' signifying emotion.