Meaning of “number one” in the English Dictionary

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"number one" in English

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number onenoun [ U ]

uk ​ /ˌnʌm.bə ˈwʌn/ us ​ /ˌnʌm.bɚ ˈwʌn/

number one noun [ U ] (YOURSELF)

› US also numero uno informal yourself and no one else:

Frank is completely selfish - he only cares about number one.
I'm going to look out for number one (= take care of myself only).

Thesaurus: synonyms and related words

(Definition of “number one” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"number one" in American English

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number onenoun [ C ]

us ​ /ˈnʌm·bər ˈwʌn/

› the best or highest ranking person or thing:

She’s still number one in tennis.

(Definition of “number one” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"number one" in Business English

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number onenoun [ U ]

uk ​ us ​

› informal the person or thing that is the best or has the most important position in an organization, group, market, etc.:

They ran an aggressive advertising campaign as part of their plan to become number one in the UK market.
Sustainable success is our number one priority.

(Definition of “number one” from the Cambridge Business English Dictionary © Cambridge University Press)

Translations of “number one”
 
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