Meanings

subject for study (inquiry, enquiry)

problem for a prize contest

research task

traffic problem

current issues

resources problem

matter of life or death

examination (exam) questions

practical question

housing problem

serious (vital) question

political issue (problem)

story (verbal) problem

problem area

propositional (sentential) function

exercises

energy problems

to be titled (e.g. a book)

environmentalist

applied question