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A form of chess in which each move must be completed within a very short time, usually ten seconds.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Chess & Draughts) rapid chess in which either each move has a fixed time allowed (usually 10 seconds) or each player is allotted a fixed time (often 5 minutes) for all his moves. US name: rapid transit chess
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014