noun
1. : the weight in pounds of a 500-sheet ream of paper cut to a basic size — called also basic weight, substance, substance number
2. : the weight of a sheet of paper expressed in terms of the weight of a ream of that paper
noun
1. : the weight in pounds of a 500-sheet ream of paper cut to a basic size — called also basic weight, substance, substance number
2. : the weight of a sheet of paper expressed in terms of the weight of a ream of that paper
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012