What is a Loss? Loss[los]noun1.A Loss is an injury or damage that is covered by an insurance Policy. Losses can be partial, like when wind damages part of a roof, or total, as when an automobile is “totaled” in a collision. Share | Have A Question About This Topic? Address Thank you! Oops! Related Contents Snapshots Your life is marked by images. Prepare for the unexpected, so you can keep those pictures going. When Does Your Personal Car Become a Commercial Vehicle? At what point can you call a personal vehicle commercial? Long-Term-Care Protection Strategies The chances of needing long-term care, its cost, and strategies for covering that cost.