Underfoot/ˌʌndərˈfʊt/ Definition 1 of 2Pro Tip 1/3Physical Presence Indicates something is directly on the ground where you walk. Watch your step; there's water underfoot after the spill. Pro Tip 2/3Potential Hazard Suggests that something on the ground could be dangerous or cause stumbling. The hikers found the trail tricky with rocks underfoot. Pro Tip 3/3Surface Description Used to describe the feeling or condition of the ground's surface. The plush carpet felt luxurious underfoot.