A measure of spatial extent, especially width, height, or length. often Extent or magnitude; scope: a problem of alarming dimensions. Aspect; element:"He's a good newsman, and he has that extra dimension"(William S. Paley). Mathematics The least number of independent coordinates required to specify uniquely the points in a space. The range of such a coordinate. Physics A physical property, such as mass, distance, time, or a combination thereof, regarded as a fundamental measure of a physical quantity: Velocity has the dimension of distance divided by time. A realm of existence, as in a work of fiction, that is physically separate from another such realm:"Although it tells a grounded, political story free from aliens and alternate dimensions, the film remains packed to the brim with iconic .. characters."(Conner Schwerdtfeger). To cut or shape to specified dimensions. To mark with specified dimensions.