Definition

Next-level, transcendent, or mind-blowingly cool in a way that defies normal description. When something hits different and conventional adjectives just don't cut it.

Example Usage

The production quality on that new album is lifethereal—I've never heard anything like it.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=lifethereal&defid=4870184)