Cast/kæst/ Definition 1 of 5Pro Tip 1/3Metaphorical Use Sometimes used to imply throwing away or rejecting something non-physical. After the scandal, he cast his old principles aside. Pro Tip 2/3Casting Shadows Often used to describe how light creates shadows or a presence. The tall trees cast long shadows as the sun set. Pro Tip 3/3Casting Looks Can mean to give a look, glance, or expression. She cast a worried glance at the clock.