To dress up is a phrasal verb used to say that you are putting on more elegant clothes or wearing a costume.
For example:
Normally my sister wears jeans and a t-shirt, but last weekend she dressed up to go to a friend’s wedding. She looked amazing in a red silk gown.
Tonight, I have to dress up in a pirates costume as I’m going to a fancy dress party. My boyfriend is dressing up as a parrot.
Read more at: To Dress Up
Inglés Málaga 