4D — English Dictionary

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Adjective

Abbreviation of four-dimensional. Describes a 3D film experience that is supplemented with synchronized physical effects.
Usage
- not-comparable
Abbreviation of four-dimensional. Denotes imaging modes with 3D capability that can also record over time.
Usage
- not-comparable
Examples

4D-CT
Having a quirky or oddball personality.
Usage
- not-comparable
- Slang
Examples

Being considered 4D is usually when an idol behaves and acts differently or strangely compared to the usual Korean standards.

If every K-pop group has a “4D” member, V was probably BTS's. He's grown up significantly since then, emanating maturity and wisdom […]

Word forms

4-D

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