plasma screen n (Electronics) a type of flat screen on a television or visual display unit in which the image is created by electric current passing through many gas-filled cells Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014