Definitions

1. noun

A musical chord that consists of three or more different notes, especially one that consists of the root, third, and fifth of a key.

“The composer used a polychord to create a unique and complex sound in her symphony.”

2. noun

A group of three or more frequencies that are simultaneously sounded or perceived as a single entity, such as in acoustics or physics.

“The researcher studied the properties of polychords in sound waves to better understand the physics of music.”