secret

American  

[see-krit] / ˈsi krɪt /

adjective

1. done, made, or conducted without the knowledge of others.

   secret negotiations.

   Synonyms:

   covert, hidden, clandestine

   Antonyms:

   manifest, open

2. kept from the knowledge of any but the initiated or privileged.

   a secret password.

   Synonyms:

   confidential, private

3. faithful or cautious in keeping confidential matters confidential; close-mouthed; discreet.

   Synonyms:

   reticent, secretive, close

4. designed or working to escape notice, knowledge, or observation: the secret police.

   a secret drawer;

   the secret police.

5. secluded, sheltered, or withdrawn.

   a secret hiding place.

6. beyond ordinary human understanding; esoteric.

   Synonyms:

   mysterious, cryptic, occult

7. (of information, a document, etc.)

   1. bearing the classification secret.

   2. limited to persons authorized to use information documents, etc., so classified.

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noun

• secrets
  plural

1. something that is or is kept secret, hidden, or concealed.

2. a mystery.

   the secrets of nature.

3. a reason or explanation not immediately or generally apparent.

4. a method, formula, plan, etc., known only to the initiated or the few: a trade secret.

   the secret of happiness;

   a trade secret.

5. a classification assigned to information, a document, etc., considered less vital to security than top-secret but more vital than confidential, and limiting its use to persons who have been cleared, as by various government agencies, as trustworthy to handle such material.

6. (initial capital letter) a variable prayer in the Roman and other Latin liturgies, said inaudibly by the celebrant after the offertory and immediately before the preface.

idioms

1. in secret, unknown to others; in private; secretly.

   A resistance movement was already being organized in secret.

secret British  

/ ˈsiːkrɪt /

adjective

1. kept hidden or separate from the knowledge of others

2. known only to initiates

   a secret password

3. hidden from general view or use

   a secret garden

4. able or tending to keep things private or to oneself

5. operating without the knowledge of outsiders

   a secret society

6. outside the normal range of knowledge

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noun

1. something kept or to be kept hidden

2. something unrevealed; mystery

3. an underlying explanation, reason, etc, that is not apparent

   the secret of success

4. a method, plan, etc, known only to initiates

5. liturgy a variable prayer, part of the Mass, said by the celebrant after the offertory and before the preface

6. among the people who know a secret

secret More Idioms  

1. see in secret; open secret.

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Other Word Forms

Derived Forms

• secretness
  noun
• supersecret
  noun
• nonsecret
  adjective
• quasi-secret
  adjective
• semisecret
  adjective
• ultrasecret
  adjective
• secretly
  adverb

Inflected Forms

Nouns

• secrets
  plural

Etymology

Origin of secret

First recorded in 1350–1400; Middle English secrette, from Old French secret, from Latin sēcrētus “hidden,” originally past participle of sēcernere “to secern ”

Explanation

A secret is something you don’t want everybody to know, like your secret crush on the bus driver. A secret can also be a mystery known to only a few — the secret of the lost pyramid. There might be a secret passageway in your basement that only you know about. You could have a secret passion for Japanese anime comics and share that secret with only your closest friends. If you're "in on a secret" — plans for a surprise birthday party, for instance — that means you're in the inner circle of people in the know. Everybody has to keep the secret, or the party won't be a surprise.

Example Sentences

See Examples For:

secret secrets

In “Wonder Man,” Abdul-Mateen portrayed Simon Williams, a struggling actor with superpowers that he had to keep secret so he could work in Hollywood.

From Los Angeles Times ● Aug. 21, 2026

Advice for a shocking family discovery: What would you do if you discovered you have secret siblings?

From Slate ● Aug. 21, 2026

Comporta, Portugal’s chicest beach destination, is no longer a secret.

From The Wall Street Journal ● Aug. 21, 2026

Costa Rica's Rebeca Grynspan was the front-runner after last month's first informal vote, in which the council's 15 members, including the five with veto power, pass judgment in secret on the candidates.

From Barron's ● Aug. 21, 2026

It stood where I had shoved it in my panic: directly in front of the secret panel.

From "The Hiding Place" by Corrie ten Boom

Their ventures were most successful when they spilled royal secrets, offering peeks behind the palace curtain.

From The Wall Street Journal ● Aug. 21, 2026

A whistleblower jailed for leaking military secrets about Australia's involvement in Afghanistan has been released on parole after serving 27 months.

From BBC ● Aug. 13, 2026

The phenomenon will present scientists with a rare opportunity to study the Sun's atmosphere and its outermost layer, as they seek to uncover secrets about solar winds and our star's magnetic field.

From Barron's ● Aug. 11, 2026

The party has long grappled with venal insiders—including antigraft inspectors—who leak secrets about corruption probes in return for bribes.

From The Wall Street Journal ● Aug. 10, 2026

She led her daughters back to their apartment with a vitamin box full of Soviet secrets under her baby son’s blanket.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin

Related Words

• classified
• covert
• furtive
• hush-hush
• mysterious
• obscure
• private
• secluded
• undercover
• underground
• undisclosed
• unknown
• unpublished