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English definition of “sidebar”

sidebar

noun [C]
 
 
/ˈsaɪdbɑːr/
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)
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