When you scavenge, you pick through discarded things looking for whatever is salvageable and can be reused. If you're looking for a replacement part for a vintage car, you might scavenge at the dump for a suitable part.
If you're a freegan you've embraced the idea of trying to live for free, recycling and reusing what others have discarded, leaving a small footprint on the planet. You’re on the lookout for good places to scavenge, such as the dumpster behind a busy supermarket, where you might find edible food, or the trash bins at clothing stores, where wearable clothing is tossed out. Vultures, hyenas, and other animals that feed on carrion — dead animals — also scavenge.