Secrete/sɪˈkriːt/ Definition 1 of 2Pro Tip 1/3Biological context Often used in scientific or medical discussions related to the body's functions. Enzymes are secreted by the pancreas to aid digestion. Pro Tip 2/3Automatic process The action of secreting a substance is not under voluntary control. You cannot stop your stomach lining from secreting acids. Pro Tip 3/3Not always visible The secretion process may be invisible without medical equipment. The hormone is secreted directly into the bloodstream.