A costume is a set of clothes you wear when you want to dress up like another person. You might wear a witch's costume to go trick-or-treating on Halloween, or put on a George Washington costume to reenact a scene from the American Revolution in a play.
A costume is a set of clothes that is unique to a particular person or time period. If you were starring as Dorothy in your neighborhood production of The Wizard of Oz, your costume would consist of a blue-and-white checkered dress and ruby slippers. On the other hand, if you were starring as Lady Godiva, you wouldn't need much of a costume at all!
n the attire characteristic of a country or a time or a social class
v dress in a costume
- dress up
attire, deck out, deck up, dress up, fancy up, fig out, fig up, get up, gussy up, overdress, prink, rig out, tog out, tog up, trick out, trick up
put on special clothes to appear particularly appealing and attractive