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a major cause of traffic problems in the city
the problem of unemployment
Homelessness is a serious problem for a lot of young people.
We've been having problems with the heating in the office.
That still doesn't solve our problem.
The continuing bad weather is causing serious problems for farmers.
Racial tensions in the south of the city pose a real problem for the police.
They're the best cameras on the market. The only problem is they're incredibly expensive.
This is the British English definition of problem. View American English definition of problem.
a substance that scientists think exists out in space, but for which they have no direct proof