(informal) The lumbar region. / A lumbar vertebra.

(Canada, US) Wood sawn into planks or otherwise prepared for sale or use, especially as a building material. / (now rare) Old furniture or other items that take up room, or are stored away.

(intransitive) To move clumsily and heavily; to move slowly. / (transitive, with with) To load down with things, to fill, to encumber, to impose an unwanted burden on / To heap together in disorder.

(informal) A clumsy, stupid person; an awkward bungler.

Emitting light; glowing brightly; shining. / Brightly illuminated. / Clear; enlightening; easy to understand.

(anatomy) Any of the five vertebrae in the loin or lower back region of the spine.

Something that protrudes, sticks out, or sticks together; a cluster or blob; a mound or mass of no particular shape. / A swelling or nodule of tissue under the skin or in an internal part of the body.

(transitive) 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).

Emitting light by luminescence.

(uncountable) Backache of the lumbar region or lower back, which can be caused by muscle strain or a slipped disc. / (countable) An episode of such backache.