I/O device


plural I/O devices
computing : a peripheral that transmits input to or output from a computer's central processor
… user interface I/O devices (such as monitors, keyboard, and mouse) …Samuel A. Recine and Liv Stewart
I/O devices have been something of a mystery to many working in digital video. What seems like a simple enough concept—needing a device to get video in or out of a computer—can lead to a multitude of devices with a massive number of features.Odin Lindblom

Word History

First Known Use

1961, in the meaning defined above

Time Traveler
The first known use of I/O device was in 1961

Dictionary Entries Near I/O device


I/O device


Cite this Entry

“I/O device.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/I%2FO%20device. Accessed 21 Jun. 2024.

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