What is the difference between 'collision' and 'comprehensive' coverage?

Collision and Comprehensive are two separate physical damage coverages on a PAP, each with its own deductible. Collision pays for damage to the insured's auto when it collides with another vehicle or object, or when it overturns. Comprehensive (technically called Other-Than-Collision or OTC) pays for damage from causes other than collision: theft, fire, vandalism, falling objects, hitting an animal, weather events (hail, flood, hurricane), broken glass, and similar. Most lenders require both coverages on financed or leased vehicles. Both are subject to deductibles ($500 or $1,000 are common). Both pay actual cash value (ACV) of the vehicle — replacement cost minus depreciation. Older vehicles with low ACV may not be economical to insure with physical damage coverage; many drivers drop one or both coverages once the vehicle's value falls below the cost of the premium plus deductible.