a. [ L. clandestinus, fr. clam secretly; akin to celare, E. conceal: cf. F. clandestin. ] Conducted with secrecy; withdrawn from public notice, usually for an evil purpose; kept secret; hidden; private; underhand; as, a clandestine marriage. Locke.
Syn. -- Hidden; secret; private; concealed; underhand; sly; stealthy; surreptitious; furtive; fraudulent.
-- Clan*des"tine*ly, adv. -- Clan*des"tine*ness, n. [ 1913 Webster ]