Ethereal

• Ethereal oils, concentrated, hydrophobic liquids containing volatile aromatic compounds extracted from plants
• Wireshark (formerly Ethereal), a software network traffic analyzer
• Ethereal, a horse that won Australia's Caulfield and Melbourne Cups in 2001
• Ethereal Home Theatre, a company that specializes in home theatre cables, but also makes other audio/video products

Music

• Ethereal Wave, a genre of Dark Wave music

Fiction

• A plane of existence in Dungeons & Dragons
• Ethereal (alien), the fictional alien race from the video game X-COM: UFO Defense
• An ethereal creature, e.g., a fairy.
• Ethereal Warp/Immaterium Warhammer 40,000

See also

• Ether
• Aether
• Corporeal
• Incorporeal