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).
Top Definition. ether. It makes you behave like the village drunkard in some early irish novel ... total loss of all basic motor skills: blurred vision, no balance, numb tongue---severance of all connection between the body and the brain. Which is intresting, because the brain continues to function more or less normally ... You can actually watch your self behaving in this terrible way, but you cant control it.