What is the meaning of Cosmetic?

Imparting or improving beauty, particularly the beauty of the complexion.

External or superficial; pertaining only to the surface or appearance of something.

Any substances applied to enhance the external color or texture of the skin, e.g. lipstick, eyeshadow, eyeliner; makeup.

A feature existing only on the surface.

An intangible influence that improves the overall perception of some thing or situation.

cosmetic

Source: wiktionary.org