Number one vs Premier

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

Number one

Top 2,000 (common)

Premier

FormalTop 3,000 (common)C1adjective
Most formal: PremierMost common: Number one
 Number onePremier
Pronunciation🇬🇧 //ˈnʌmbər wʌn//🇺🇸 //ˈnʌmbər wən//🇬🇧 /["/ˈpremiə(r)/"]/🇺🇸 /["/prɪˈmɪr/"]/
MeaningThe best or most important thing or person.the most important or best
ExampleShe is number one in her class.one of the country’s premier chefs
RegisterNeutralFormal
How commonTop 2,000 (common)Top 3,000 (common)
CEFR level-C1
Part of speechadjective
Collocationsnumber one priority, number one hit, number one team, number one choice, number one spotpremier event, premier league, premier product, premier destination
Antonymsloser, leastinferior, secondary
Common mistakesConfused with 'number 1' vs 'number one'., Used inappropriately as a noun without context., Mistakenly capitalized in informal writing.Using 'premier' as a verb incorrectly., Confusing 'premier' with 'premiere' (the first showing of a movie).
Usage notesUsed to indicate the top position in rankings or to emphasize importance. Avoid in very formal contexts.Often used to describe top-level events, leaders, or products. In informal contexts, a simpler word like 'best' might be used instead.

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Number one

Frequently asked questions: Number one vs Premier

What's the difference between Number one and Premier?

Number one: The best or most important thing or person. Premier: the most important or best

Which is more formal: Number one and Premier?

Premier is the most formal of these.

Which is more common: Number one and Premier?

Number one is the most common in everyday English.

Can you show an example of each?

Number one: She is number one in her class. Premier: one of the country’s premier chefs

Can I use Number one and Premier interchangeably?

Not always. Number one and Premier 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.

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