compactness
noun /kəmˈpæktnəs/,  /ˈkɒmpæktnəs/
  /kəmˈpæktnəs/,  /ˈkɑːmpæktnəs/
[uncountable]- the fact of using or filling only a small amount of space
- the ladder's light weight and extreme compactness
 
 - the quality in a person or an animal of being small and strong
- He had the natural compactness of a good ball player.
 
 - the fact of being closely packed together
- soil compactness