# Fourth Normal Form (4NF)

BCNF with no nontrivial multivalued dependency unless its determinant is a superkey.

## What is **Fourth Normal Form (4NF)** in a relational database?

**Fourth Normal Form (4NF)** — BCNF with no nontrivial multivalued dependency unless its determinant is a superkey.

Level: Freelancer · [More Database terms at this level](https://www.ask-codey.com/glossary/subjects/database/freelancer)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/fourth-normal-form-4nf