Lump (?), n. [Cf. OD. lompe piece, mass. Cf. Lunch.] 1. A small mass of matter of irregular shape; an irregular or shapeless mass; as, a lump of coal; a lump of iron ore. “ A lump of cheese.” Piers Plowman. “ This lump of clay.” Shak.
2. A mass or aggregation of things.
3. (Firearms) A projection beneath the breech end of a gun barrel.
In the lump, In a lump, the whole together; in gross.
They may buy them in the lump. Addison.
— Lump coal, coal in large lumps; — the largest size brought from the mine. — Lump sum, a gross sum without a specification of items; as, to award a lump sum in satisfaction of all claims and damages.