Something that protrudes, sticks out, or sticks together; a cluster or blob; a mound or mass of no particular shape.

“Stir the gravy until there are no more lumps.”

A group, set, or unit.

“The money arrived all at once as one big lump sum payment.”

A small, shaped mass of sugar, typically about a teaspoonful.

“Do you want one lump or two with your coffee?”

To treat as a single unit; to group together in a casual or chaotic manner (as if forming an ill-defined lump of the items).

“People tend to lump turtles and tortoises together, when in fact they are different creatures.”

To bear a heavy or awkward burden; to carry something unwieldy from one place to another.

To hit or strike (a person).