From Longman Dictionary of Contemporary Englishsidebarside‧bar /ˈsaɪdbɑː $ -bɑːr/ noun [countable] 1 a separate part of something such as a newspaper article where extra information is given2 American English law an occasion when the lawyers and the judge in a trial discuss something without letting the jury hear what they are saying
Examples from the Corpus
sidebar• Longer boxed sections in magazines are sometimes referred to as sidebars.From Longman Business Dictionarysidebarside‧bar /ˈsaɪdbɑː-bɑːr/ noun [countable] COMPUTING a long narrow area containing written material at the side of the main material on a website 