- The branch of philosophy that deals with the nature and expression of beauty, as in the fine arts.
- In Kantian philosophy, the branch of metaphysics concerned with the laws of perception.
- The study of the psychological responses to beauty and artistic experiences.
- A conception of what is artistically valid or beautiful: minimalist aesthetics.
- An artistically beautiful or pleasing appearance: "They're looking for quality construction, not aesthetics” ( Ron Schram).