the pressure exerted by blood on the walls of blood vessels, esp. the systemic arteries; (colloquial) abnormally high (or, rarely, abnormally low)…

the pressure produced in an artery by the wave of blood flow corresponding to a pulse; spec. the difference between systolic and diastolic blood…

In the genitive, esp. in Gaertner's phenomenon. Designating the change in the degree of fullness of veins of the arm as it is raised to varying…

an increased volume of circulating blood in the body.

Normal blood (or intravascular fluid) volume; the condition of having a normal volume of blood.