Ethereal wave, also called ethereal darkwave, ethereal goth or simply ethereal, is a subgenre of dark wave music that is variously described as "gothic", "romantic", and "otherworldly". Developed in the early 1980s in the UK as an outgrowth of gothic rock, ethereal wave was mainly represented by 4AD bands such as Cocteau Twins, This Mortal Coil, and early guitar-driven Dead Can Dance.

Dark wave is a music genre that emerged from the new wave and post-punk movement of the late 1970s. Dark wave compositions are largely based on minor key tonality and introspective lyrics and have been perceived as being dark, romantic and bleak, with an undertone of sorrow. The genre embraces a range of styles including cold wave, ethereal wave, gothic rock, neoclassical dark wave and neofolk.