To put on clothes that are more formal or nicer than usual, often for a special occasion.
You don’t need to dress up for the barbecue; jeans are fine.
A: Are you going to dress up for the party tonight? B: Yeah, I think I’ll wear my new suit.
In my country, people usually dress up for weddings and other important celebrations.
Common mistake
✗Do I need to dress up myself?
✓Do I need to dress up?
'Dress up' is intransitive — no reflexive 'myself'.
Tell it apart
Everyone dressed up for the wedding.
wore smart clothes
The kids dressed up as superheroes.
wore costumes
Use 'dress up' when talking about wearing nicer clothes for events like parties, weddings, or interviews.'Dress up' is different from 'dress down', which means to wear more casual clothes.
To make something, especially information or a situation, seem more impressive, important, or attractive than it really is, often by exaggerating or presenting it in a misleadingly positive way.
The company tried to dress up its financial results to make the quarter look more successful than it actually was.
A: Did you read the report? It sounds like everything is going perfectly. B: Don't be fooled—they've really dressed up the numbers to hide the problems.
Some politicians tend to dress up their achievements during campaigns, making it difficult for voters to distinguish between genuine progress and exaggerated claims.
Common mistake
✗He dressed up the failure like a success.
✓He dressed up the failure as a success.
Use 'dress up X as Y' — 'as', not 'like'.
Tell it apart
They dressed up the bad results.
made them seem better than they were
They dressed up for the party.
wore smart clothes
'Dress up' in this sense is used in both spoken and written English, often in critical or analytical contexts (e.g., media, business, politics). It suggests manipulation or selective presentation, but is less formal than 'embellish' or 'manipulate.'Unlike the B2 sense ('make something look more attractive'), this sense is figurative and often carries a negative or critical connotation, implying that the facts or situation are being misrepresented or exaggerated, not just improved in appearance.