It is an adjective and can be used to describe a person, object, or place that is unpleasant to look at.
For example:
* "Il est laid." (He is ugly.)
* "La maison est laide." (The house is ugly.)
* "Le chat est laid." (The cat is ugly.)
Note: While "laid" can be used in some contexts, it is generally considered rude and offensive to use it to describe a person. It is best to avoid using this word when talking about people's appearance.