No attempt is made here to provide an abstract definition of this term. Instead, it will be defined by example.
The SI-recommended fundamental dimensions are:
- $\mathsf M$: mass
- $\mathsf L$: length
- $\mathsf T$: time
- $\Theta$: temperature
- $\mathsf I$: electric current
- $\mathsf N$: amount of substance
- $\mathsf J$: luminous intensity
Compare with units of measurement.
This concept of dimension is more abstract than that of units, which are standard quantities of the particular dimension in question.
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): Entry: dimensions