1 If the invitation says black tie, women should wear a floor-length, evening gown. 2  A tuxedo is mandatory if you're a man. 3  This is your chance to dress as if you were headed to the Oscars. 4  Black tie optional means that wearing a tuxedo or long evening gown is not mandatory, but guests should feel free to do so.
Ether is an organic functional group consisting of a disubstituted oxygen, or an oxygen atom bonded to 2 carbon atoms (if adjacent to a ketone, functional group is then called an ester).
LINK / CITE ADD TO WORD LIST. adjective. A forest scene with an ethereal feel. A forest scene with an ethereal feel. The definition of ethereal is someone or something that is light, airy or heavenly. 1  An example of ethereal is the voice of a person who seems to whisper when talking.2  An example of ethereal is a party room decorated only with the color white, using soft fabrics such as netting and chiffon.INK / CITE ADD TO WORD LIST. adjective. A forest scene with an ethereal feel. A forest scene with an ethereal feel. The definition of ethereal is someone or something that is light, airy or heavenly. 1  An example of ethereal is the voice of a person who seems to whisper when talking.