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Definitions

secret

[see-krit] / ˈsi krɪt /
ADJECTIVE
hidden, unrevealed
Synonyms
STRONGEST
classified covert furtive hush-hush mysterious obscure private secluded undercover underground undisclosed unknown unpublished
STRONG
backdoor close closet dark deep mystic occult unseen
WEAK
abstruse ambiguous arcane camouflaged cloak-and-dagger clouded conspiratorial covered cryptic disguised enigmatical esoteric mystical on the Q.T. out-of-the-way recondite reticent retired shrouded strange under wraps unenlightened unfrequented unintelligible veiled
Antonyms
STRONGEST
aboveboard apparent honest known obvious open public revealed sociable unconcealed
STRONG
light visible
WEAK
clear defined explicit forthright legal legitimate
ADJECTIVE
underhand, clandestine
Synonyms
STRONGEST
classified confidential covert furtive hush-hush restricted secretive surreptitious
STRONG
backdoor backstairs close inside sneak
WEAK
camouflaged cryptic discreet disguised dissembled dissimulated in ambush incognito sly sneaky stealthy sub-rosa top-secret unacknowledged under false pretense under-the-table underhanded
Antonyms
STRONGEST
aboveboard forthright honest known open public
WEAK
clear defined explicit legal legitimate revealed unconcealed
NOUN
something kept hidden, unrevealed
Synonyms
STRONGEST
code confidential information key mystery
STRONG
cipher confidence enigma formula occult oracle password puzzle unknown
WEAK
classified information magic number privileged information skeleton in cupboard
Antonyms
WEAK
known public knowledge revelation

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.

The Vatican also played a major role in secret negotiations that led the Obama administration to re-establish full diplomatic relations with Cuba in 2015.

From The Wall Street Journal • Apr. 3, 2026

A24 and Borgli surely knew this secret couldn’t stay hidden forever, and that’s ultimately a good thing.

From Salon • Apr. 3, 2026

Whilst this was "no secret", she described this rise as "unsustainable".

From BBC • Apr. 1, 2026

Google’s researchers said a quantum computer may be on the horizon that’s powerful enough to crack a bitcoin wallet’s secret key in as few as nine minutes, potentially giving attackers access to investors’ funds.

From MarketWatch • Mar. 31, 2026

My hands wanted to turn over page after page and delve into my sister’s secret world.

From "Code Name Kingfisher" by Liz Kessler

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.