If I say Height of a block = 2m, then would "Height" be called as a dimension
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Casually I would say the dimensions are MASS, LENGTH and TIME (and others). A unit is a metric (yardstick) to measure said dimensions. So one meter (unit) is used to quantify a specific length (dimension).
This allows the combination of dimensions through multiplication and division to derive other units such as Speed = Meter/Second => LENGTH/TIME
answered Jul 15, 2015 at 12:10
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$\begingroup$ I don't really like this answer because there's no reason there have to be only three dimensions. $\endgroup$– David ZCommented Jul 15, 2015 at 12:47
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$\begingroup$ Agreed. 7 fundamental dimensions. Principle is correct however. $\endgroup$– PhizzyCommented Jul 15, 2015 at 13:13
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$\begingroup$ Would it be correct to say that a dimension is a degree of freedom - a quantity or a quality by which a system can vary? $\endgroup$– ErnieCommented Jul 15, 2015 at 13:27
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$\begingroup$ I was starting simple here. $\endgroup$ Commented Jul 15, 2015 at 17:12