Any device with a screen other than that of a television set.

Origin: The Television was the first, widely adapted technological advancement that allowed users to ignore human interaction by offering visual and audible stimulation. Secondary devices such as computers, handhelds and cellphones have become a means of distraction in this new technological age and are constantly evolving to offer more time wasting and socially hermitting features.
If you don't get off the internet now, I will lock up the power cords and batteries to all the second screens in the house. That means-No Computer, No Ipod, No Cellphone, No gameboy, No portable dvd player, No PSP, No graphing calculator, not even allowed to have your e-reader.
by Thomasthomasthomas December 28, 2011
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The opening of a second screen for distraction and/or entertainment purposes (e.g. emails, Instagram, Facebook) while attending a video meeting on a separate screen via Zoom, FaceTime, etc.
During the Zoom staff meeting, Mollie second screened and caught up on her emails.

Daniel was obviously second screening during the meeting; he was tweeting at the same time.
by MikeInDC October 27, 2020
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When you forget to bypass commercials on your Tivo because your on your second device
Doh! I missed bypassing the commercial. Must be suffering from second screen syndrome.
by AnnoyedGymUser July 20, 2014
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