Kept or done in secret, often in order to conceal an illicit or improper purpose. See Synonyms at secret.(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.
Use "clandestine" in a sentence
"And they are the people in the agency that make things happen, as far as collecting intelligence and running what we call clandestine operations."
"The line that separates openly official and covert/clandestine is not a bright one."
"Private security guards working for Blackwater USA participated in clandestine CIA raids against suspected insurgents in Iraq and ... military | Comment | Recommend"