Tray/treɪ/ Definition 1 of 4Pro Tip 1/3Carrying Items Trays are often used to carry multiple items at once without dropping them. Waiters often use a tray to carry glasses to the table. Pro Tip 2/3Serving Food Trays can be decorative and used to present food elegantly at gatherings. The silver tray was filled with appetizers. Pro Tip 3/3Everyday Use Trays are not just for special occasions; they're used daily in homes and restaurants. She uses a breakfast tray every morning.