'Lumping' definitions:

Definition of 'Lumping'

From: GCIDE

Lump \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]

From: GCIDE