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.
Princeton's WordNet(5.00 / 1 vote)Rate this definition: 1  profound(adj) showing intellectual penetration or emotional depth. 2  profound(adj) of the greatest intensity; complete. 3  fundamental, profound(adj) far-reaching and thoroughgoing in effect especially on the nature of something.  profound(adj) coming from deep within one.