Aspect; element: "He's a good newsman, and he has that extra dimension” ( William S. Paley).
A measure of spatial extent, especially width, height, or length.
Extent or magnitude; scope. Often used in the plural: a problem of alarming dimensions.
Mathematics The least number of independent coordinates required to specify uniquely the points in a space.
Mathematics The range of such a coordinate.
Physics A physical property, such as mass, length, time, or a combination thereof, regarded as a fundamental measure or as one of a set of fundamental measures of a physical quantity: Velocity has the dimensions of length divided by time.