1) Architectural element 2) French word used in English 
[architecture] Trumeau, in architecture, is the central pillar or mullion supporting the tympanum of a large doorway, commonly found in medieval buildings. It is often sculpted. ==Gallery== File:Trumeau.eglise.abbatiale.Vezelay.png|Drawing of a trumeau from the Vézelay Abbey File:Tarragona - Catedral, claustro 39.jpg|Romanesque trumeau at ...
piece of wall or pillar between two openings
A form of two-part mirror frame in which an ornamental panel is featured above the mirrored glass.
French term for pier-glass. In the Louis XV period it was traditionally decorated with a painted canvas that was set in the frame above the mirror.
Vertical architectural member between the leaves of a doorway. Trumeaus were often highly decorated.
Stone pillar or column supporting the tympanum of a portal at its center (fig.3, E).