tray S3 / treɪ / 名词 [可数名词]

1 a flat piece of plastic, metal, or wood, with raised edges, used for carrying things such as plates, food etc :

The waiter brought drinks on a tray.

2 a flat open container with three sides used for holding papers, documents etc on a desk

in tray (= for holding documents you still have to deal with )

out tray (= for holding documents you have dealt with )

3 especially British English a flat open container with four sides used for holding certain things :

a cat litter tray

seed tray (= a tray in which you plant seeds )

→ baking tray , system tray