1.Definition: a question raised for consideration or solution

"Our homework consisted of ten problems to solve"

Category: General

2.Definition: a source of difficulty

"One trouble after another delayed the job", "What's the problem?"

Related Noun(s):trouble

Category: General

3.Definition: a state of difficulty that needs to be resolved

"She and her husband are having problems", "It is always a job to contact him", "Urban problems such as traffic congestion and smog"

Related Noun(s):job

Category: General