The difference between Dimension and Magnitude

Dimension as a noun:

A single aspect of a given thing.

Dimension as a noun:

A measure of spatial extent in a particular direction, such as height, width or breadth, or depth.

Dimension as a noun:

A construct whereby objects or individuals can be distinguished.

Dimension as a noun (geometry):

The number of independent coordinates needed to specify uniquely the location of a point in a space; also, any of such independent coordinates.

Dimension as a noun (linear algebra):

The number of elements of any basis of a vector space.

Dimension as a noun (physics):

One of the physical properties that are regarded as fundamental measures of a physical quantity, such as mass, length and time.

Dimension as a noun (computing):

Any of the independent ranges of indices in a multidimensional array.

Dimension as a noun (science fiction, fantasy):

An alternative universe or plane of existence.

Dimension as a verb (transitive):

To mark, cut or shape something to specified dimensions.

Magnitude as a noun (uncountable, countable):

The absolute or relative size, extent or importance of something.

Magnitude as a noun (countable):

An order of magnitude.

Magnitude as a noun (mathematics):

A number, assigned to something, such that it may be compared to others numerically

Magnitude as a noun (mathematics):

Of a vector, the norm, most commonly, the two-norm.

Magnitude as a noun (astronomy):

The apparent brightness of a star (on a negative, logarithmic scale); apparent magnitude

Magnitude as a noun (seismology):

A measure of the energy released by an earthquake (e.g. on the Richter scale).