Implies a sense of urgency and possible danger when used to describe someone or something coming closer. As the truck bore down on the pedestrian, they leapt aside.
Pro Tip 2/3
Visual Imagery
Often creates a mental picture of something large or unstoppable approaching. The eagle was bearing down on its prey from high above.
Pro Tip 3/3
Metaphorical Use
Can describe non-physical things, like deadlines or events, that create a sense of pressure. The exam date was bearing down on the students.