Definition of forum
1a
: the marketplace or public place of an ancient Roman city forming the center of judicial and public business
b
: a public meeting place for open discussion "The club provides a forum for people interested in local history."
c
: a medium (such as a newspaper or online service) of open discussion or expression of ideas
2
: a judicial body or assembly
: COURT
3a
: a public meeting or lecture involving audience discussion "The town has scheduled a public forum to discuss the proposal."
b
: a program (as on radio or television) involving discussion of a problem usually by several authorities