To press down and release a button on (a pointing device) twice in rapid succession in order to activate a command or function represented graphically on a display screen.
To double-click a pointing device.
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.