One dimension is a line. It has length, nothing else. Picture a number line.
Two dimensions is a plane. It has length and width. Picture a graph.
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The four dimensions of Space Time are one real dimension r=ct and three vector dimensions Ix + Jy + Kz. All the dimensions have units of meters. The idea of a dimension of time is an historical artifact.
The dimensions of each one are going to have some bearing on the answer.
It's true that a point has no dimensions. But a line has one dimension, not two. A plane has two dimensions, a solid has three, and that's about all that ordinary people can visualize.
The scale factor between two similar shapes is the ratio of the dimensions of one (often the smaller) compared with the dimension of the other (the larger).
Space can be divided into n different dimensions. Every dimension is orthogonal to rest all the dimensions. That is the dot product of x with y is zero (y not equal to x).