Something is overgrown if it is covered in growth, outside of where it should be. Gardens can become overgrown if they are neglected and left to run wild with no-one to prune the plants and pull out the weeds.
Two or more things are overlapping if one of them covers up some part of the other so you can't see the one behind. The two leaves in the picture are overlapping.
Something is overloaded if it is carrying a load that is too big for it. The car in the picture is overloaded.
Fruit is overripe if has become ripe and then kept going. Overripe fruit becomes soft and squishy, and may also get brown or wrinkly. Overripe fruit is not very nice to eat.
Someone is overweight if they weigh more than they should. People or animals are usually overweight because they are too fat.
Scientific name: order: strigiformes
Owls are birds of prey, which means they eat other animals. They usually sleep during the day and hunt at night. Owls mostly hunt small animals, insects and other birds. They are found in almost everywhere on Earth. A group of owls is called a parliament.
You are the owner of something if you possess it and it belongs to you. The man in the picture is the owner of the dog in the picture.
An ox, also called a bullock, is a cow that is used as a work animal, usually for pulling things like carts and ploughs. The plural of ox is oxen. Oxen are typically yoked together in pairs to pull things.
Scientific name: family: ostreidae
Oysters are a kind of mollusc that lives in the sea or salty water. Their shell is in two halves like a clam shell, and the oyster can pull it closed. Oysters eat by filtering food from the water that flows over its shell. They live their adult lives stuck to rocks - a young oyster that has just stuck to a rock is called a spat. Oysters have been eaten for thousands of years. They can be eaten raw, cooked, smoked or as part of another dish like soup.