noun a mass or aggregation of things.
2. lump ·vi to take in the gross; to speak of collectively.
3. lump ·noun a projection beneath the breech end of a gun barrel.
4. lump ·vi to throw into a mass; to unite in a body or sum without distinction of particulars.
5. lump ·vi to get along with as one can, although displeased; as, if he does n't like it, he can lump it.
6. lump ·noun a small mass of matter of irregular shape; an irregular or shapeless mass; as, a lump of coal; a lump of iron ore.