A death ritual was the means by which a culture or species regards and disposes of their deceased.
Odo claimed to Quark in 2369 that "humanoid death rituals are an interest of mine," adding, "[e]verybody needs a hobby. Some species burn their dead, others pack them in blocks of ice. Some even surround themselves with the company of family corpses. But the Ferengi ritual of chopping up their loved ones and selling them? I find that irresistible." (DS9: "The Alternate")