A governmental agency that deals with espionage and other acts of secrecy.

A club, fraternal organization, or other association which admits only selected individuals as members, whose meetings and practices are often ritualistic and not public, and which often has the purpose of furthering the social or economic opportunities of its members.

plural of secret Santa

plural of secret menu

A collection of unofficial, unadvertised food items available at a fast food restaurant, known to customers only by word of mouth.

plural of secret sock

(Africa) no show sock

plural of secret recipe

A recipe whose details are held under secrecy.

plural of decapitation secretion