1. A compact mass
   "a lump of mud caught him on the shoulder";
   - ball, clod, glob, clump, chunk
    
2. A large piece of something without definite shape
   "a lump of coal";
   - hunk
    
3. An abnormal protuberance or localized enlargement
   "He noticed a lump on his neck";
   - swelling, puffiness
    
4. [informal] An awkward stupid person
   "He behaved like a lump at the dinner party";
   - lout, clod [informal], stumblebum [N. Amer, informal], goon [informal], oaf, lubber, lummox [informal], gawk, clot [Brit], clodhopper [informal], clodpole [archaic, informal]

1. Group or chunk together in a certain order or place side by side
   "The teacher lumped similar maths problems together";
   - collocate, chunk
    
2. Put together indiscriminately
   "lump together all the applicants";
   - chunk

Derived forms: lumped, lumping, lumps

Type of: accumulate, agglomeration, amass, clumsy person, collect, compile, enlargement, group, hoard, part, piece, pile up, roll up, symptom

Encyclopedia: Lump