# Definition of Dimension

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## Last revised 2003-10-25

Eric Weisstein, MathWorld: **Dimension** = A topological measure of the size of an object's covering properties. Roughly speaking, it is the number of coordinates needed to specify a point on the object.

American Heritage Dictionary: **Dimension** = The least number of independent coordinates required to specify uniquely the points in a space.

Webster's Revised Unabridged Dictionary: **Dimension** = The degree of manifoldness of a quantity; as, time is quantity having one dimension; volume has three dimensions, relative to extension.

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