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.
1. penetrating deeply into subjects or ideas: a profound mind. 2. showing or requiring great knowledge or understanding: a profound treatise. 3. situated at or extending to a great depth. 4. reaching to or stemming from the depths of one's nature: profound regret. 5. intense or absolute: profound silence. 6. thoroughgoing; extensive: profound changes.