What does it meaning tired, in the dream?

Literally, concerning a particular activity... Dream Dictionary Unlimited

When you are young, dreaming of retirement demonstrates a desire to forget your worries and live more peacefully. Probably you are carrying a great tension and the subconscious is telling you you need to enjoy a period of calm.

If the dreamer is already retired in real life, it is just a reflection of their current situation.... The Big Dictionary of Dreams

Feeling tired in dreams is often the literal reflection of a situation in real life.

It is important to try to remember what the cause was in the dream and then interpret its symbolism. Perhaps, you have not yet noticed the real reason for the excessive fatigue that you suffer.... The Big Dictionary of Dreams