'Thin' in the Bible

Then seven bad-looking, thin cows were coming up after them from the Nile, and they stood beside the other cows at the edge of the river.

The bad-looking, thin cows ate the seven fine-looking, fat cows. Then Pharaoh woke up.

Then seven heads of grain, thin and burned by the east wind, were sprouting up after them.

The thin heads swallowed up the seven healthy and full heads. Then Pharaoh woke up and realized it was a dream.

Then seven heads of grain, withered and thin and burned with the east wind, were sprouting up after them.

The thin heads of grain swallowed up the seven good heads of grain. So I told all this to the diviner-priests, but no one could tell me its meaning."