Adjectives that start with O

You are obese if you are very fat or overweight. Obese people often have health problems because of their size.

Offshore means in the water some distance from the shore, the sandy area where land meets a body of water such as an ocean or a lake.

Something is old fashioned if it looks like it belongs in the past, and doesn't fit in with things around it. Clothes can be old fashioned, and behaviour can be old fashioned too.
Old fashioned things can also be called retro.

Something is open if you can go through it or into it. The door in the picture is open. The opposite of open is closed.

Something is original if it has never been done before. An idea is original if it has never been thought of before, and a painting is original if it is the first time that picture has been painted. If something has been made as a copy or modified from something else, the thing it has been copied from is the original.
The dress in the picture is original, because it is hand-made and there is no other dress like it.

You go out when you go away from something, or out from inside something. For example, you might go out to a restaurant. If you rearrange some items, they become out of order.
The cat in the picture is getting out of a box.
The opposite of out is in.

Something is overloaded if it is carrying a load that is too big for it. The car in the picture is overloaded.

Someone is overweight if they weigh more than they should. People or animals are usually overweight because they are too fat.