- The act of secreting or concealing; as, the secretion of
dutiable goods. - The act of secreting; the process by which material is
separated from the blood through the agency of the cells of the various
glands and elaborated by the cells into new substances so as to form
the various secretions, as the saliva, bile, and other digestive
fluids. The process varies in the different glands, and hence are
formed the various secretions. - Any substance or fluid secreted, or elaborated and
emitted, as the gastric juice.