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Definitions

surreptitious

[sur-uhp-tish-uhs] / ˌsɜr əpˈtɪʃ əs /
ADJECTIVE
sneaky, secret
Synonyms
STRONGEST
clandestine covert furtive hush-hush unauthorized
WEAK
fraudulent hidden hole-and-corner on the Q.T. on the sly private skulking slinking sly sneaking stealthy sub-rosa under wraps under-the-table undercover underhand veiled
Antonyms
STRONGEST
aboveboard forthright honest open public truthful
WEAK
authorized

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Just before 7 a.m., a Benin intelligence operative took surreptitious video of five rebel armored vehicles and four pickups leaving QRF headquarters, hazard lights flashing.

From The Wall Street Journal • Mar. 12, 2026

A surreptitious change of bank details does not bode well for your mother’s estate planning.

From MarketWatch • Feb. 13, 2026

In a written statement, she claimed "The Mail's Unlawful Acts against me involve landline tapping my phones and recording my live telephone conversations, placing surreptitious mics on my home windows."

From Barron's • Jan. 22, 2026

She alleges the Mail tapped her landlines and placed "surreptitious mics on my home windows" in an effort to get stories.

From BBC • Jan. 22, 2026

In a surreptitious meeting with Pizarro, Thupa Wallpa proclaimed that he was Washkar’s legitimate heir.

From "1491" by Charles C. Mann