A metric unit of volume, commonly used in expressing concentrations of a chemical in a volume of air. One cubic meter equals 35.3 cubic feet or 1.3 cubic yards. One cubic meter also equals 1000 liters or one million cubic centimeters.
A US capacity measure (for liquid) equal to 4 quarts or 3.785 liters. Note also there are different measures of US dry gallons and UK gallons.