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noun\də-ˈmen(t)-shən also dī-\
Definition of DIMENSION
a (1): measure in one direction; specifically: one of three coordinates determining a position in space or four coordinates determining a position in space and time (2): one of a group of properties whose number is necessary and sufficient to determine uniquely each element of a system of usually mathematical entities (as an aggregate of points in real or abstract space) <the surface of a sphere has two dimensions>; also: a parameter or coordinate variable assigned to such a property <the three dimensions of momentum>(3): the number of elements in a basis of a vector space
: measure in one direction; specifically: one of three or four coordinates determining a position in space or space and time
In mathematics, a number indicating the fewest coordinates necessary to identify a point in a geometric space; more generally, a number indicating a measurement of length (seelength, area, and volume). One-dimensional space can be represented by a numbered line, on which a single number identifies a point. In two-dimensional space, a coordinate system may be superimposed, requiring only two numbers to identify a point. Three numbers suffice in three-dimensional space, and so on.