M3 can refer to different things depending on the context. Here are some possible meanings:
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Money Supply: In economics, M3 is a measure of the money supply that includes M2 as well as large time deposits, institutional money market funds, short-term repurchase agreements, and larger liquid assets. M3 is closely associated with larger financial institutions and corporations than with small businesses and individuals. M3 was traditionally used by economists to estimate the entire money supply within an economy and by governments to direct policy and control inflation over medium and long-term.
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Volume: In the International System of Units (SI), m3 (cubic meter) is the unit of volume. It is the volume of a cube with edges one meter in length. A cubic meter of pure water at the temperature of maximum density (3.98 °C) and standard atmospheric pressure (101.325 kPa) has a mass of 1000 kg, or one tonne.
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Moving Space: In the context of moving house or office, a cubic meter (m3 or CBM) is a block of space that measures 1m x 1m x 1m, height x width x depth. This unit of measurement is how furniture removalists measure space in their trucks.
