Definition (disambiguation)
- About Last Night... (album)
- Circular definition
- Defined (album)
- Defining equation (physical chemistry)
- Definition (Diaura EP)
- Definition (Jersey EP)
- Definition (TV series)
- Definition (album)
- Definition (song)
- Definitions (How I Met Your Mother)
- Definitions (Plato)
- Dogmatic definition
- Dynamical system (definition)
- Elementary definition
- Field of definition
- High-definition television
- Intensional definition
- Recursive definition