Grit/ɡrɪt/ Definition 1 of 4Pro Tip 1/2Physical Sensation Use 'grit' to describe the irritating feel of tiny particles. She winced as she felt grit against her skin. Pro Tip 2/2Not Just Dirt 'Grit' often implies toughness or hardiness of the particles. Boot prints were left in the wet grit on the sidewalk.