Dictionary definition · lump
noun
- a compact mass"a ball of mud caught him on the shoulder"
- an abnormal protuberance or localized enlargement
- an awkward stupid person
- a large piece of something without definite shape"a hunk of bread"
verb
- put together indiscriminately"lump together all the applicants"
- group or chunk together in a certain order or place side by side
Source: Open English WordNet (CC BY 4.0).