Definitions

1. adjective

relating to the chest or breast

“The pectoral muscles were well-developed in the athlete.”

2. noun

a part of an animal’s skeleton that supports the breast or shoulder, especially in birds and reptiles

“The pectoral fin of the fish was damaged in the collision.”

3. noun

an ornament or decoration worn on the chest, especially a piece of jewelry

“The pectoral of the ancient warrior was a symbol of his status.”