If you climb something such as a tree, mountain, or ladder, or climb up it, you move towards the top of it. If you climb down it, you move towards the bottom of it.

If you climb somewhere, you move there carefully, for example because you are moving into a small space or trying to avoid falling.

When something such as an aeroplane climbs, it moves upwards to a higher position. When the sun climbs, it moves higher in the sky.

When something climbs, it increases in value or amount.