Meaning

• 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?"

• A dull or lazy person.

  "Don't just sit there like a lump."

• (as plural) A beating or verbal abuse.

  "He's taken his lumps over the years."

• A projection beneath the breech end of a gun barrel.

• A kind of fish, the lumpsucker.

• Food given to a tramp to be eaten on the road.

Meaning

• 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).