Wreckage is what remains after something has been violently destroyed or badly damaged. After a severe earthquake, the wreckage of collapsed buildings might be visible for miles. When a tornado tears through a town, the splintered wood, crumbled bricks, and scattered belongings left behind are wreckage.

The word carries a sense of devastation and loss. Searchers might comb through airplane wreckage looking for clues about what went wrong. Divers explore shipwrecks on the ocean floor, finding wreckage that's been underwater for centuries.

You can also use wreckage figuratively. After a huge argument between friends, someone might try to sort through “the wreckage” of their relationship, meaning they're dealing with the emotional damage left behind. Whether literal or figurative, wreckage is what you're left with after something falls apart.