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second thought (often pl.) a reconsideration of, or doubt about, a previous decision or opinion.
second wind the return of comparative ease in breathing, following a brief period of exhaustion, that often occurs during a physically demanding activity such as running. [2 definitions]
secrecy the state or condition of being secret. [2 definitions]
secret concealed from others; private. [8 definitions]
secret agent a person who performs acts of espionage and other undercover operations, esp. for a government.
secretarial of or relating to the work of a secretary.
secretariat the department of a government, organization, or the like that is entrusted with administration, record keeping, and secretarial work, or the employees of such a department. [2 definitions]
secretary a person who works for a business or individual at such tasks as typing, filing and managing correspondence. [4 definitions]
secretary bird a large black and gray-blue African bird of prey with a long neck, long legs, and a crest of long feathers that resemble quills.
secretary-general the chief executive of a secretariat.
secretary of state (cap.) the person who heads the U.S. Department of State. [4 definitions]
secrete1 to generate or separate (a fluid or other substance) from an organism's cells or fluids and then release (it) into the organism's system.
secrete2 to hide or conceal.
secretin a hormone secreted by the small intestine that stimulates the production of pancreatic juice and bile as part of the digestive process.
secretion the act or process, in a cell or gland, of separating or generating a fluid or other substance from body cells or fluids and then releasing it into the body's system. [2 definitions]
secretive tending to secrecy.
secretly in a secret manner, so as to conceal the action from others involved. [2 definitions]
secretory of, having the function of, or pertaining to secretion; secreting. [2 definitions]
secret police a police force that conducts undercover operations designed to discourage opposition to the government.
secret service a government service that conducts espionage and other undercover operations so as to gain knowledge of, and often to frustrate the activities of, hostile individuals, groups, and governments. [2 definitions]
secret society an organized group that keeps some of its activities or rituals secret from nonmembers.