In our daily life "Chaos" is usually used as a meaning of disorder which is frequently used with the word "order." I think "order" corresponds to "cosmos" and "disorder" does to "chaos."　

I would like to consider "Chaos" by Zhuangzi, as a conclusion of series of stories for this time.

However, the concept of "Chaos" here seems to mean a still larger world. This talk is at the last part of Yingdiwang (Qualified Kings) editing in "Zhuangzi."
The following is my translation.

The king of the South Sea was called Shu, the king of the North Sea was called Hu, and the king of the Central was Hundun. Shu and Hu often met Hundun in his country, and Hundun always entertained them very well. Then, Shu and Hu consulted about repaying for his kindness.

They said, "Every person has seven holes, by which he is able to see, hear, eat or breathe, but only this Hundun does not have these seven holes. Let's try to make holes for him."

Then, a hole a day was made every day, and after seven days Hundun died.

Description ;
Shuhu is a compound word of shu and hu, and both shu and hu mean a moment or an instant, or mean to be transient or to be momentary.

Shuhu is used as the symbol of an extremely short time or a moment.

Hundun is a Chinese word meaning Chaos. Here, it seems to mean the great disorder, and would be the symbol of the world of an actual existence including all "inconsistencies and confrontation."

Let me add my description here as a conclusion of this series. I think that seven holes here mean the function of so-called the five senses. Every day, we live our life using a sensor called the five senses, that is, the sense of hearing, sight, smell, taste and touch. And it would be sure that we really get many pleasures by them.
The theme of this fable seems to suggest that even if we can catch the appearance of things by using the five senses only, it would be impossible for us to grasp the essence of things by them only.
Chaos who got seven holes became another existence that is not Chaos who had been till then, that is, he became an ordinary man with the five senses.
I guess it would be unsatisfactory for him to have become another existence.

When seeing the essence of things we will not depend upon only the reason which we saw in the story "You see fish swimming happily", and we will not depend on only the feeling i.e. the five senses which we saw in the story "Chaos".
We who live at present will not deny the side of reason, nor will we deny the side of feeling.

I think there would be another position that is exceeding both reason and feeling. And there we see it as it is.

In addition, there are many interesting stories in Zhuangzi.
They are, for example, thought of "Uniformity of all things", thought of "symbiosis" and "coexistence" relevant to natural environment, and those physical themes, such as sky's blueness, resonance of musical instrument, electricity of the thunderbolt, etc.