1 problem /ˈprɑːbləm/ noun
plural problems
1 problem
plural problems
Learner's definition of PROBLEM
[count] : something that is difficult to deal with : something that is a source of trouble, worry, etc.
: difficulty in understanding something
: a feeling of not liking or wanting to do something
[count] : a mathematical question to be solved

no problem

informal also not a problem
used to say that you are happy to do something or that you are not bothered by something
2 problem /ˈprɑːbləm/ adjective
2 problem
Learner's definition of PROBLEM
always used before a noun