Meaning of “sidebar” in the English Dictionary

"sidebar" in Business English

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sidebarnoun [ C ]

uk /ˈsaɪdbɑːr/ us

INTERNET a narrow area on the left or right of a website page giving extra information, often other parts of the website that the user can go to:

Click on items in the sidebar to navigate to other pages.

a narrow area to one side of a newspaper or book page with a short article or other piece of writing in it, usually one that is related to the main information on the page:

Accompanying the article are two sidebars, one showing the letter from the Justice Department.

(Definition of “sidebar” from the Cambridge Business English Dictionary © Cambridge University Press)