- Of or relating to dispossessed, often displaced people who have been cut off from the socioeconomic class with which they would ordinarily be identified: lumpen intellectuals unable to find work in their fields.
- Of or relating to the lumpenproletariat.
- Vulgar or common; plebeian: "Popular novelists and their mass readership remain a despised lumpen minority” ( Leslie Fiedler).
- The lumpenproletariat.
- A member of the lumpenproletariat.