10 months ago
Last edited at 7:58PM on 7/14/2012
Dimensionality is different from curvature. some of the previous answers were "flat" which means no curvature. But a two dimensional surface can be flat (a plain) or curved (a sphere). One dimensionality means it has only length and no width or hight. It can be a line, or a circle, or a Mobius strip, to mention just some famous examples. On a one dimensional manifold you can move in only one direction; you need just one coordinate to specify uniquely where you are on it.