noun. the quality of having great meaning or value.

noun. The state or measure of being meaningful.

noun. the quality of having great value or significance

"Project can have varying degrees of authenticity to emphasize their long-term meaningfulness, an attribute with which games may have a hard time competing."

significance  

purposefulness  sense of purpose  

civism  consubstantiation  faultiness  majestick  operatum  

articulateness  command of language  command of words  effective style  eloquence