Definition:Dimension (Measurement)/Fundamental Dimensions

Definition
The fundamental dimensions are:
 * Mass, denoted $M$ or $\mathbf M$
 * Length, denoted $L$ or $\mathbf L$
 * Time, denoted $T$ or $\mathbf T$

It is convenient at elementary levels of physics to add:
 * Temperature, denoted $\Theta$
 * Electric charge, denoted $Q$ or $\mathbf Q$

However, it is possible to define these in terms of mass, length and time, so strictly speaking they are not fundamental, as such.