a piece of clothing worn by a woman or girl that covers the top of her body and part or all of her legs [↪ skirt]:
Sheila wore a long red dress.
a summer dress
clothes for men or women of a particular type or for a particular occasion:
a gentleman in evening dress (=formal clothes worn especially at important social events)
The play was performed in modern dress (=clothes from the present time).
dress code (=a standard of what you should wear for a particular situation)
This restaurant has a strict dress code - no tie, no service.