dress up
2 meanings
wear smart or formal clothes for a special occasion
What does "dress up" mean in this sense?
Examples
- Do I need to dress up for the restaurant, or is it quite casual?
- She always dresses up for the theatre — she loves any excuse to wear something elegant.
- We didn't dress up for the party because the invitation said it was informal.
How to use it
This is the most common pattern, where 'for' introduces the event or reason for dressing up.
Are we supposed to dress up for the office party?
Modal constructions are very natural here, especially in questions or advice about dress codes.
You don't have to dress up — it's just a casual dinner at my place.
Degree adverbs like 'a bit' or 'really' are often added to show how formal the effort needs to be.
The venue is quite smart, so I'd dress up a bit if I were you.
Used with verbs expressing attitude or frequency to describe someone's general habits around dressing formally.
My brother rarely dresses up — he wore jeans to his cousin's graduation.
Common Collocations
Common Mistakes
In this sense, 'dress up' is intransitive, which means it never takes a direct object. Do not add 'yourself' or any other object after it.
When someone wears a costume to look like a character or creature, we say 'dress up as'. Without 'as', the phrase means wearing smart clothes for an occasion — a completely different situation.
Usage
This phrasal verb is neutral and works in both British and American English. 'Get dressed up' is an equally natural and very common alternative, especially in American English, and you can use both interchangeably.
wear special clothes to look like someone or something else
Sense 2: What does "dress up" mean?
Examples
- The children dressed up as superheroes for the school event.
- Are you going to dress up as anything for Halloween this year?
- She has always loved dressing up — even as a small child.
How to use it
This is the most common pattern. Use 'as' to say who or what the costume represents.
My brother dressed up as a pirate for the Halloween party.
Use 'for' to say which occasion or event the costume is for, without naming the specific character.
All the students dressed up for the school carnival.
The gerund form 'dressing up' is very natural after verbs like 'love', 'enjoy', and 'like'.
She has always enjoyed dressing up, even as a young child.
When the context is already clear, you can use 'dress up' on its own without naming the costume.
The kids were so excited — they couldn't wait to dress up.
This describes a state — the person is already in their costume. It uses 'dressed up as' as a description, not an action.
He was dressed up as a vampire for the entire evening.
Common Collocations
Common Mistakes
When you name the character or thing you are dressed as, you must use 'as'. Leaving it out or using 'like' instead sounds unnatural in standard English.
If 'dress up' appears without 'as + character', it usually means wearing smarter or more formal clothes than usual — not a costume. Make sure to include 'as + character' when you mean a disguise or costume.
In this sense, 'dress up' has no direct object — you cannot place a noun or pronoun between 'dress' and 'up'. The costume is always introduced with 'as', not placed inside the phrasal verb.
Usage
This phrasal verb is neutral and suits both spoken and written English. It is especially common in family and social contexts. In British English, a party where you wear costumes is often called a 'fancy dress party', while Americans usually say 'costume party'.
Frequently Asked Questions
Does 'dress up' always mean wearing very formal clothes?
Not necessarily — it's relative to your normal style. If you usually wear jeans, putting on smart trousers could count as dressing up. The phrase simply means making more effort than usual for a particular occasion.
What's the difference between 'dress up' and 'get dressed up'?
'Get dressed up' means exactly the same thing as 'dress up' in this sense. 'Get dressed up' can sound slightly more emphatic about the effort involved, and it is particularly common in American English, but both are correct and natural.
Can 'dress up' be used in questions about dress codes?
Yes — this is actually one of the most common uses. Questions like 'Do I need to dress up?' or 'Should we dress up for this?' are very natural and frequently heard in everyday conversation.
Does 'dress up' always mean wearing smart clothes, or can it mean something else?
The same form 'dress up' can have other meanings in different contexts — for example, wearing a costume. However, this page focuses on the smart-clothes sense. You can usually tell which meaning is intended from the context, especially whether the sentence includes 'for + occasion' or 'as + character'.
Do I always need to say 'as' when I use 'dress up' for a costume?
You need 'as' when you name the specific character or thing you are representing — for example, 'dress up as a fairy' or 'dress up as a historical figure'. If the costume is already clear from context, or you just want to say that someone wore a costume without specifying which one, you can leave out 'as' entirely, for example 'The kids love to dress up'.
Can I say 'dress up like a vampire' instead of 'dress up as a vampire'?
In everyday speech, some people do say 'like' instead of 'as', but 'as' is the standard and more widely accepted choice. It is safer to use 'dress up as' to make sure your English sounds natural in all situations.
Is there a difference between a 'fancy dress party' and a 'costume party'?
They mean the same thing — a party where guests wear costumes. 'Fancy dress party' is the typical British English expression, while 'costume party' is more common in American English. Both describe exactly the kind of event where people dress up as characters or themed outfits.
Does 'dress up as' always refer to a fictional character, or can it be a real person too?
It can be either. You can dress up as a fictional character like a superhero or a witch, but also as a real or historical person, such as a famous explorer or a historical queen. The important thing is that you are wearing a costume or disguise to represent someone or something.
Can I use 'dressing up' as a noun, like an activity?
Yes, 'dressing up' works very naturally as a noun phrase to describe the activity itself, especially when talking about children's play. For example: 'Dressing up is her favourite game' or 'They have a whole box of dressing-up clothes'. You will often see it written with a hyphen when it is used before another noun, like 'dressing-up box'.
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