Noun has 3 senses

• splitter(n = noun.person) - a worker who splits fish and removes the backbone;

Derived form verb split₂

• splitter(n = noun.person) divider - a taxonomist who classifies organisms into many groups on the basis of relatively minor characteristics;

Antonym: lumper

• splitter(n = noun.person) rail-splitter - a laborer who splits logs to build split-rail fences;

Derived form verb split₂