This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as buried (genealogy).
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+26B0 forms with similar adjacent characters prevents a line break inside it.
The CLDR project calls this character “coffin” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: dead, death, vampire.
This character is designated as an emoji. It will be rendered as monochrome character on conforming platforms. To enable colorful emoji display, you can combine it with Variation Selector-16: ⚰️ See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
A coffin is a funerary box used for viewing or keeping a corpse, for either burial or cremation.
Coffins are sometimes referred to as caskets, particularly in American English. Any box in which the dead are buried is a coffin, and while a casket was originally regarded as a box for jewelry, use of the word "casket" in this sense began as a euphemism introduced by the undertaker's trade. A distinction is commonly drawn between "coffins" and "caskets", using "coffin" to refer to a tapered hexagonal or octagonal (also considered to be anthropoidal in shape) box and "casket" to refer to a rectangular box, often with a split lid used for viewing the deceased as seen in the picture. Receptacles for cremated and cremulated human ashes (sometimes called cremains) are called urns.