Definition from Wiktionary, the free dictionary
- Wearing formal (dress) clothes.
- Everyone was so nicely dressed up for the wedding, I couldn't help taking a picture.
- Wearing a costume.
- It was supposed to be a costume party, but almost no one dressed up.
- She was six months pregnant, so everyone got a laugh when she dressed up as a nun for the Halloween party.
- simple past tense and past participle of