Pectoral/ˈpektərəl/ Definition 1 of 4Pro Tip 1/3Gym Vocabulary Often used in fitness to describe workouts targeting the chest area. Her trainer included more pectoral exercises into her routine. Pro Tip 2/3Not Gender Specific Pectoral refers to the chest for all genders, not exclusively males. The surgeon explained the pectoral implant procedure. Pro Tip 3/3Biological Context Used in anatomy and zoology for structures relating to the chest. Whales have large pectoral fins for steering.