Something in a central position, especially a decorative object or arrangement placed at the center of a table.
The central or most important feature: "Now comes decontrol, the centerpiece of [the President's] energy program” ( Tom Alexander).
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.