4DN

4Dn is a term that has appeared in various niche contexts to denote a four-dimensional construct. It is not a standard term in mathematics, physics, or computer science, and there is no single, widely accepted definition. Consequently, the meaning of 4Dn is context-dependent and can vary between sources.

In academic and technical writing, four-dimensional concepts are usually described with explicit notation rather than using the shorthand 4Dn. When 4Dn appears, it is typically a shorthand or variable name chosen by the author to discuss a four-dimensional object that depends on a parameter n; however, this usage is noncanonical and should be clarified in the text.

In popular culture and online discussions, 4Dn may be used as a proper noun, a product name, or a fictional concept with no relation to formal mathematics. The lack of a standard definition means readers should consult the original source for intended meaning.

See also: four-dimensional space, higher-dimensional space, dimensional notation.