What do you mean by sitting in silhouette?

This word means to describe the shape and outline of a person or object's shadow from the side.

When the side of a person or object is illuminated by a light source, its outline and shape will be projected on the background, forming a black silhouette. This kind of silhouette usually only shows the outline of the object, but not the details or surface details. Due to the lack of details, silhouette can produce an abstract, concise and expressive effect.

Silhouettes are often used in works of art to highlight the gestures, actions or emotions of characters. It can create a dramatic effect by simplifying the shape and outline and emphasizing the lines and gestures of characters. In photography and movies, silhouette is also widely used to create unique visual effects and atmosphere.