Definition of "top-secret" []

• Containing information whose unauthorized disclosure would pose the gravest threat to national security: authorized for access to top-secret reports. (adjective)
• Of or relating to top-secret information: top-secret clearance. (adjective)
• Accessible or known to authorized personnel only: a top-secret reconnaissance mission. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "She declined to be named in part because she does not want to jeopardize her husband's top-secret clearance at his government contracting job."
• "Most of his time at the agency involved top-secret covert actions, including bloody 1954 coups in Guatemala and a 1960s plot to assassinate Cuban leader Fidel Castro."
• "If i were you i'd keep that stand location top-secret."