Costume vs Outfit

When to use each in English, with meaning, register, and examples.

Costume

Top 2,000 (common)B1noun

Outfit

Top 2,000 (common)B2noun
 CostumeOutfit
Pronunciation🇬🇧 /["/ˈkɒstjuːm/"]/🇺🇸 /["/ˈkɑːstuːm/"]/🇬🇧 /["/ˈaʊtfɪt/"]/🇺🇸 /["/ˈaʊtfɪt/"]/
MeaningAn outfit worn for a particular occasion, often for parties or performances.A set of clothes worn together for a specific occasion.
ExampleShe wore a vibrant costume for the Halloween party.She was wearing an expensive new outfit.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB1B2
Part of speechnounnoun
Collocationsfull, colourful/​colorful, elaborate, be dressed in, dress in, have on, design, designer, drama, in costume, full, colourful/​colorful, elaborate, be dressed in, dress in, have on, design, designer, drama, in costumecomplete, new, summer, wear, choose, pick, in a/​the outfit, large, small, professional
Antonymsnudity, plainnessundress, disrobe
Common mistakesConfused with 'custom', meaning a practice or habit., Using 'costume' for regular clothes instead of special outfits.Using 'outfits' as a singular noun., Confusing 'outfit' with 'clothing' which is more general., Using 'outfit' only for formal wear; it applies to casual wear too.
Usage notesUse 'costume' when referring to clothing for events like Halloween or theatrical performances. Avoid using it in formal contexts not related to dress or play.Use 'outfit' when talking about clothes for events (like parties, work, etc.). It's neutral, so it fits both casual and formal contexts.

Frequently asked questions: Costume vs Outfit

What's the difference between Costume and Outfit?

Costume: An outfit worn for a particular occasion, often for parties or performances. Outfit: A set of clothes worn together for a specific occasion.

Which is more advanced: Costume and Outfit?

Outfit is the highest level, at B2, on the CEFR scale.

Are Costume and Outfit the same CEFR level?

Costume: B1, Outfit: B2 on the CEFR scale.

What part of speech are Costume and Outfit?

Costume: noun, Outfit: noun.

Can you show an example of each?

Costume: She wore a vibrant costume for the Halloween party. Outfit: She was wearing an expensive new outfit.

Can I use Costume and Outfit interchangeably?

Not always. Costume and Outfit are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.