The chemical reactions and pathways involving dibenzofuran, a substance composed of two benzene rings linked by one ether bond and one carbon-carbon bond. Dibenzofuran is a white crystalline solid created from the production of coal tar and used as an insecticide and an intermediate in the production of other chemicals. [ GOC:ai http://eawag-bbd.ethz.ch/dbf/dbf_map.html ]