a flat, shallow container or receptacle made of wood, metal, etc., usually with slightly raised edges, used for carrying, holding, or displaying articles of food, glass, china, etc.
2.
a removable receptacle of this shape in a cabinet, box, trunk, or the like, sometimes forming a drawer.
3.
a tray and its contents: to order a breakfast tray from room service.
O.E. treg, trig "flat board with a low rim," from P.Gmc. *traujan (cf. O.Swed. tro, a corn measure). Related to O.E. treow "wood, tree," and the primary sense may have been "wooden vessel."