tray 1
/tray/ , n.
1. 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.
[ bef. 1050; ME; OE treg, trig; c. OSw trö corn measure; akin to TREE ]
tray 2
/tray/ , n. Australian Slang.
a coin worth threepence. Also called tray bit .
[ 1895-1900; cf. earlier argot trey, tray three, a set of three, prob. ult. tre ( tres THREE); cf. TREY ]