1 way people can exchange ideas
ADJ. important, useful, valuable | public
VERB + FORUM create, provide (sb with) | act as, be used as, serve as
PREP. ~ for The conference provides a useful forum for the exchange of views and ideas.
2 meeting at which people can exchange ideas
ADJ. open The film show was followed by an open forum on editing techniques. | international, national
VERB + FORUM hold | attend, go to
FORUM + VERB take place
PREP. ~ on An international forum on economic development took place in Brussels.