1. the quality or state of being gross; extreme rudeness, vulgarity, or lack of refinement
Usage: common in informal contexts
2. the quality of being disgusting or repulsive
Usage: informal
3. the state of being large or bulky in size; obesity
Usage: dated or offensive when referring to body size

Examples

• The grossness of his language offended everyone at the dinner table.
• She was appalled by the grossness of the joke he told.
• The grossness of the abandoned building made it unsuitable for habitation.
• His comments displayed a shocking grossness that no one expected from him.
• The grossness of the exaggeration made the story unbelievable.
• I can't believe the grossness of that prank—it was completely inappropriate.