Tumble/ˈtʌmbl/ Definition 1 of 6Pro Tip 1/3Sudden Drop Tumble implies a quick, uncontrollable fall, often leading to confusion or surprise. As she raced to the bus, she tumbled over a rock. Pro Tip 2/3Accidental Movement Tumble usually suggests the fall was not planned or expected. Distracted by his phone, he tumbled off the curb. Pro Tip 3/3Motion Hint When someone tumbles, they may roll or flip in addition to falling. The hiker tumbled down the hill, rolling over rocks.