A row of buttons or graphical controls on a computer screen that represent open programs, among which the user can switch back and forth by clicking on the appropriate one. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "taskbar" in a sentence
"I've been using a black based desktop background for so long I didn't notice that the taskbar is already transparent/glass-like."
"The fact that it declutters the taskbar is a nice bonus."
"Taskbar Eliminator is a single-purpose application that removes the taskbar from the screen and keeps it from popping up or getting in the way, letting you use your 3rd-party dock in peace."