From GNU Collaborative International Dictionary of English, version 0.54:
Lump (lŭmp), 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.
[1913 Webster]
2. A mass or aggregation of things.
[1913 Webster]
3. (Firearms) A projection beneath the breech end of a gun barrel.
[1913 Webster]
In the lump, In a lump, the whole together; in gross.
[1913 Webster]
They may buy them in the lump.
-- Addison.
-- Lump coal, coal in large lumps; -- the largest size brought from the mine. -- Lump sum, (a) a gross sum without a specification of items; “as, to award a lump sum in satisfaction of all claims and damages”. (b) a single sum paid once in satisfaction of a claim, as contrasted with the alternate choice of several payments over a period of time; -- sometimes allowed, e.g., as an alternative to periodical pension payments for a lifetime.
[1913 Webster]
From GNU Collaborative International Dictionary of English, version 0.54:
Lump, v. i. [imp. & p. p. Lumped (?); p. pr. & vb. n. Lumping.]
1. To throw into a mass; to unite in a body or sum without distinction of particulars.
[1913 Webster]
The expenses ought to be lumped together.
-- Ayliffe.
[1913 Webster]
2. To take in the gross; to speak of collectively.
[1913 Webster]
Not forgetting all others, . . . whom for brevity, but out of no resentment to you, I lump all together.
-- Sterne.
[1913 Webster]
3. To get along with as one can, although displeased; as, “if he doesn't like it, he can lump it”. [Low]
[1913 Webster]