Thud/θʌd/ Definition 1 of 2Pro Tip 1/3Concrete Impact Used when describing the noise made by solid objects colliding. When the vase hit the floor, it made a distinct thud. Pro Tip 2/3Heavy Emphasis Used to suggest the weight or intensity of the falling object. We heard the thud of footsteps from someone heavy. Pro Tip 3/3Onomatopoeia The word 'thud' mimics the actual sound of impact, a feature called onomatopoeia. A thud echoed in the alley as the bag of cement dropped.