Which term describes the disposition of human remains without formal ceremonies?

The term that accurately describes the disposition of human remains without formal ceremonies is "Direct disposition." This term is often used in the context of funeral services to indicate a straightforward handling of the remains, typically involving either burial or cremation without the additional elements of traditional funerary practices such as viewings, memorial services, or other ceremonial observances.

Direct disposition focuses primarily on the practical aspects of handling remains in a manner that avoids elaborate procedures or rites. This may cater to families seeking a simplified process, providing an option that prioritizes the logistical and economic factors over ceremonial traditions.

Though "immediate burial" and "simple cremation" are specific methods of disposition, they may still involve some level of ceremony or service depending on the circumstances and personal choices of the family. "Unceremonious disposal" is a broader term that might imply a lack of ceremony but could carry negative connotations or insinuate a lack of care that is not necessarily aligned with the more respectful term "direct disposition."