1. a person who composes music; a composer
Usage: less common than 'composer'; sometimes used in academic or formal contexts
2. a person who practices or advocates compositionism, a philosophical or artistic approach emphasizing composition and assembly
Usage: specialized; used in philosophy, art theory, and design discourse

Examples

• The compositionist spent hours arranging the orchestral score.
• Many modern compositionist thinkers explore how objects are assembled and combined.
• As a compositionist, she believed that meaning emerges from how elements are put together.
• The film's compositionist created a haunting soundtrack.
• In design theory, a compositionist approach focuses on the relationships between parts.