Hematocrit is a blood test that measures the percentage of the volume of whole blood that is made up of red blood cells. This measurement depends on the number of red blood cells and the size of red blood cells.
Definition of profound for Students. 1  1 : having or showing great knowledge and understanding a profound thinker. 2  2 : very deeply felt profound sorrow.
The definition of profound is being deep, having intellectual depth or being intensely felt. An example of profound is a scientific equation proving God's existence. very deep or low: a profound abyss, sleep, etc.