› to throw gently or easily: He tossed his dirty clothes on the floor. Matthew tossed the ball to his brother. › When you toss food, you gently mix small pieces of it together or with a sauce: I tossed the salad. › If you toss your hair or your head, you move it suddenly: The girl tossed her hair out of her eyes. toss a coin › If you toss a coin, you choose between two possibilities by throwing a coin into the air and letting each side represent one of the possibilities, then accepting the possibility represented by the side that lands facing up: We tossed to see who would go first.