Definition of Online
The term "online" refers to being connected to, served by, or available through a system, particularly a computer or telecommunications network, such as the Internet. It also refers to activities or tasks that are done while connected to such systems.
"Online" — Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/online.
Further Explanation
The word "online" first appeared in this context in 1950 and has since evolved to describe anything related to digital or networked systems.
Additional Information
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Author's Summary
The term "online" describes activities or systems that are connected to or accessed via the Internet, a concept first introduced in the 1950s.