problem Definition in the Cambridge English Dictionary
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Definition of “problem” - English Dictionary

Definition of "problem" - American English Dictionary

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problemnoun [C]

 us   /ˈprɑb·ləm/
something that ​causesdifficulty or that is hard to ​deal with: Financing the camp’s ​athleticprogram is a problem. He has a ​serioushealth problem. I’m having problems with my ​in-laws again. mathematics A problem is also a ​question to be ​answered or ​solved, esp. by ​reasoning or ​calculating: math problems
(Definition of problem from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "problem" - British English Dictionary

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problemnoun [C]

uk   /ˈprɒb.ləm/  us   /ˈprɑː.bləm/
A1 a ​situation, ​person, or thing that ​needsattention and ​needs to be ​dealt with or ​solved: financial/​health problems Our ​main problem is ​lack of ​cash. I'm having problems with my ​computer. No one has solved the problem of what to do with ​radioactivewaste. The very high ​rate of ​inflation poses/​presents (= is) a ​serious problem for the ​government. Who is going to tackle (= ​deal with) the problem of ​poverty in the ​innercities? [+ -ing verb] Did you have any problems (= difficulties) getting here? I'd ​love to come - the only problem is I've got ​friendsstaying that ​night. a ​question in ​mathematics that ​needs an ​answer: We were given ten problems to ​solve.problem child, family, etc. a ​child, etc. whose ​behaviour is ​bad
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(Definition of problem from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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