cocktail dress

:  a usually iced drink of wine or distilled liquor mixed with flavoring ingredients

:  something resembling or suggesting such a drink as being a mixture of often diverse elements or ingredients

:  a mixture of agents usually in solution that is taken or used especially for medical treatment or diagnosis

:  of, relating to, or set aside for cocktails

:  designed for semiformal wear

:  a horse with its tail docked

:  to make or set straight

:  to arrange (troops, equipment, etc.) in a straight line and at proper intervals

:  to prepare for use or service

:  apparel, clothing

:  an outer garment (as for a woman or girl) usually consisting of a one-piece bodice and skirt

:  covering, adornment, or appearance appropriate or peculiar to a particular time

:  suitable for a formal occasion

:  requiring or permitting formal dress

:  relating to or used for a dress