Given a list of $n$ nonnegative real numbers $a_1, a_2, \dots, a_n$, the geometric mean of that list is defined to be $$\sqrt[n]{a_1a_2\cdots a_n}.$$
In the case of $n=2$, there are a few standard "geometric" interpretations of the geometric mean (generally involving power of a point, to visualize how the length $\sqrt{a_1a_2}$ depends on the lengths $a_1$ and $a_2$).
For the case of $n\ge 3$, are there are also nice geometric ways of understanding what the geometric mean measures? If so, what are they?