What does it mean when a cat sighs?

What does it mean when a cat sighs? Cats usually make a sighing sound with their noses. Generally when a cat makes a sighing sound after playing or walking with its owner and half closes its eyes, it means that it is now feeling satisfied. But the cat will also make a sighing sound when it does not get a response when it wants to play with its owner, and it will usually lie on its front paws at this time, which indicates that it is disappointed and bored. Cats are hunting animals and are very focused when they lock onto their target. After the hunt is over, in order to reply from the state of intense concentration, the cat will take a deep breath and then exhale.