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English definition of “surreptitious”

surreptitious

adjective     /ˌsʌr.əpˈtɪʃ.əs/ US  /ˌsɝː-/
done secretly, without anyone seeing or knowing: She seemed to be listening to what I was saying, but I couldn't help noticing her surreptitious glances at the clock.Secrecy and privacy surreptitiously     /-li/ adverb Joe surreptitiously had a look in the answer book.Secrecy and privacy surreptitiousness     /-nəs/ noun [U] Secrecy and privacy
(Definition of surreptitious adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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