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Brief

There are 7 primary dimensions: mass, length, time, amount of matter (moles), luminosity, temperature, and current.

Details

1. Mass: A measure of how much matter is in an object, expressed in mass units (kg).
2. Length: A measure of distance or spatial extent, expressed in meters (m).
3. Time: The continuous progression of existence and events, measured in seconds (s).
4. Amount of Matter: A measure of the quantity of substance, expressed in moles (mol).
5. Luminosity: A measure of the amount of light emitted by a source, expressed in candela (cd).
6. Temperature: A measure of the thermal energy of particles in a substance, expressed in kelvin (K).
7. Current: A measure of the flow of electric charge, expressed in amperes (A).