dress up (as somebody) = wear a costume
examples:
examples:
- Little girls usually dress up as princesses and little boys dress up as cowboys.
- We should start dressing up for the party. I'm dressing up as a huge baby this year!
- Tommy dressed up as an astronaut.
- She dressed up in a very funny costume.
- My daughter likes dressing up in my clothes.
- I dressed Violeta up like a little princess!
