Okay kiddo, a slaughter house is a place where they take animals like cows and pigs to turn them into meat that people can eat.
When the animals first arrive at the slaughter house, they're put in a special area called a holding pen where they can rest while the workers get everything ready.
Once the animals are ready, they're moved to a smaller area where they're stunned by a special machine before being killed. This might sound scary, but it's important to remember that the workers make sure the animals don't feel any pain during this process.
After the animals have been killed, they're hung up by their back legs and then workers use tools to remove the skin, cut off the different parts of meat, and get the meat ready to be sent to stores and restaurants.
So, that's what a slaughter house is, a place where animals go to be turned into the meat that people eat.