number one

number one
.number 'one1 n
1.) [U]
the best, most important, or most successful person or thing in a group
Until his marriage, his job was number one in his life.
Shearson is number one in the market this year.
2.) [U and C]
the musical record that is the most popular at a particular time
number one in the charts
They've had three number ones.
3.) look out for number one also look after number one
spoken to look after yourself and not worry about other people, in a way that may seem ↑selfish
4.) [singular, U] spoken informal a word meaning ↑urine, used especially with children to avoid saying this directly
number one 2
.number 'one2 adj
1.) most important or successful in a particular situation
The University of Maine has the number one hockey team in the country.
Sweden's number one model
2.) first on a list of several things to be considered, done etc
item number one on the agenda
This has got to be our number one task.

Dictionary of contemporary English. 2013.

Synonyms:

Look at other dictionaries:

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