. To bring or draw to a common center or point of union; cause to come close together; bring to bear on one point; direct toward one object; focus: both in literal and in figurative uses.Hence To intensify the action of, as by bringing it to bear upon one point; render more intense the properties of, as by removing foreign weakening or adulterating elements; specifically, in chem., to render more intense or pure by removing or reducing the proportion of what is foreign or inessential; rectify.In mining, to separate (ore or metal) from the gangue or rock with which it is associated in the lode. See dress, 5 .To approach or meet in or around a common point or center: as, the clouds rapidly concentrated in a dense mass.To become more intense or pure. See I., 2.Reduced to a pure or intense state; concentrated.n. That which has been reduced to a state of purity or concentration by the removal of foreign, non-essential, or diluting matter.