'Centrepiece' definitions:

Definition of 'centrepiece'

noun

The central or most important feature; "education was the centerpiece of the Democratic Party's political platform" [syn: centerpiece, centrepiece]

noun

Something placed at the center of something else (as on a table) [syn: centerpiece, centrepiece]

From: GCIDE

Centerpiece \Cen"ter*piece`\, Centrepiece \Cen"tre*piece`\ (s[e^]n"t[~e]r*p[=e]s`), n.
1. An ornament to be placed in the center, as of a table, ceiling, atc.; a central article or figure. [1913 Webster]
2. Specifically: An arrangement of flowers placed in the center of a table as an ornament while dining. [PJC]
3. The central or most important feature of an activity, plan, or object; as, the centerpiece of her campaign was a proposal to slash taxes. [PJC] Center punch

From: GCIDE