The amount of matter in a given space mass volume
- The amount of matter in a given space mass per unit volume
- The amount of matter in a given space mass divided by volume
- The amount of matter in a given space or volume a relationship between mass and volume
- The amount of matter or mass there is in a given amount of space or volume
- Weight is the amount of matter or mass there is in a given amount of space or volume
- The amount of space that matter occupies