Stumble/ˈstʌmbl/ Definition 1 of 3Pro Tip 1/3Literal Tripping Used when someone physically trips or loses their footing. The runner stumbled on the uneven pavement. Pro Tip 2/3Accidental Actions Describes actions that happen by accident, not intentionally. She stumbled into the room, interrupting the meeting. Pro Tip 3/3Physical Movement Focuses on the physical aspect of movement involving losing balance. He stumbled and grabbed the rail to prevent a fall.