Category: dimensions...

measurable extents, magnitudes, and scopes such as breadth, width, height, and length
dimension coming from Latin dimetri "to measure out"
in math, the notion that a line is one-dimensional, a plane is two-dimensional, and space is three-dimensional
space-time, which is four-dimensional with four numbers needed to characterize a point (three to fix it in space and one to fix the time)
the two dimensions of the Earth's surface, latitude and longitude
the usefulness of fractional dimensions (fractals) to applied mathematics
There is a fifth dimension beyond those known to man. It is a dimension vast as space and timeless as infinity. It is the middle ground between light and shadow, between the pit of his fear and the summit of his knowledge. This is the dimension of imagination. It is an area called the Twilight Zone. (Rod Serling)
A cube head-on is a square. Step left or right and see its full dimensions.