Heartbeat/ˈhɑːrtbiːt/ Definition 1 of 4Pro Tip 1/2Physical Sensation Used to describe feeling one's own or another's pulse as a physical experience. After running, I could hear my heartbeat in my ears. Pro Tip 2/2Health Indicator Indicates health or emotional state, such as anxiety, excitement, or fitness level. The doctor checked the steady heartbeat of the patient.