blood pressure /ˈblʌd ˌpɹɛʃə(ɹ)/ noun1 •The pressure exerted by the blood against the walls of the arteries and veins; it varies during the heartbeat cycle, and according to a person's age, health and physical condition.the great majority of people who have serious conditions from high blood pressure suffer debilitating illnessThe nurse spent all day taking blood pressures at the hospital. formsblood pressures