can the human skull grow anymore after it's concidered fully grown?

Once the skull sutures (lines where the skull bones meet) fuse together within an adult, further expansion of the skull surrounded by not possible. However, growth does transpire in other places, similar to eyebrows, jaw, and other prominences. These change are what make the obverse of a 40 year old somewhat different from that of a 20 year ancient.
No.