Define forum forum synonyms forum pronunciation forum translation english dictionary definition of forum n pl fo rums also fo ra 1 a the public square or marketplace of an ancient roman city that was. Esperanto distance a far place historical ancient rome forum square or marketplace used for public business and commerce law court. According to the oxford english dictionary forum n pl forums 1 a meeting or medium for an exchange of views 2 pl fora in an ancient roman city a public square or marketplace used for judicial and othe. Plural of forum modern english usage 2nd edition ed sir ernest gowers oxford 1968 article um p 658. Look up forum forum or fora in wiktionary the free dictionary forum plural forums or fora may refer to common uses forum legal designated space for public.