confidential

adjective

con·​fi·​den·​tial ˌkän-fə-ˈden(t)-shəl 

1

a

: intended for or restricted to the use of a particular person, group, or class : private, secret

confidential information

b

: containing information whose unauthorized disclosure could be prejudicial to the national interest compare secret, top secret

2

: marked by intimacy or willingness to confide

a confidential tone

3

: entrusted with confidences (see confidence sense 4)

a confidential clerk

confidentiality

ˌkän-fə-ˌden(t)-shē-ˈa-lə-tē 

noun

confidentially

ˌkän-fə-ˈden(t)-sh(ə-)lē 

adverb

Synonyms

• behind-the-scenes
• esoteric
• hush-hush
• hushed
• inside
• intimate
• nonpublic
• private
• privy
• secret

Examples of confidential in a Sentence

These documents are completely confidential.

“I have something to tell you,” John said in a confidential tone.

Her voice was quiet and confidential.

She worked as a confidential secretary to the mayor for many years.

Recent Examples on the Web

Encryption And Access Controls: Secure backups with robust encryption and strict access policies to make sure data remains confidential. —Nick Martin, Forbes, 26 Feb. 2025

Despite registering a slight improvement, the prognosis remains confidential. —Anders Hagstrom, Fox News, 26 Feb. 2025

The company will be an anchor investor in the fund, but most of the capital is coming from outside limited partners, according to a person familiar with the matter who asked not to be named because the information is confidential. —Hayden Field, CNBC, 25 Feb. 2025

The Nebraska Department of Health and Human Services said information about children in state custody is confidential. —Elizabeth Chuck, NBC News, 25 Feb. 2025

Word History

Etymology

Latin confīdentia, taken as base of confidence entry 1 + -al entry 1 (perhaps after French confidentiel)

First Known Use

1740, in the meaning defined at sense 3

Rhymes for confidential

• differential
• inessential
• inferential
• pestilential
• quintessential
• unessential
• equipotential
• experiential
• geopotential
• jurisprudential
• nonresidential
• overpotential

Kids Definition

confidential

adjective

con·​fi·​den·​tial ˌkän-fə-ˈden-chəl 

1

: secret entry 1 sense 1a, private

confidential information

2

: indicating or suggesting closeness : intimate

a confidential tone of voice

3

: trusted with secret matters

a confidential secretary

confidentially

-ˈdench-(ə-)lē 

adverb

Legal Definition

confidential

adjective

con·​fi·​den·​tial ˌkän-fi-ˈden-chəl 

1

: known or conveyed only to a limited number of people

a confidential disclosure

2

: marked by or indicative of intimacy, mutual trust, or willingness to confide especially between parties one of whom is in a position of superiority

the confidential relationship of doctor and patient

3

: containing information whose unauthorized disclosure could be prejudicial to the national interest

confidentiality

ˌkän-fi-ˌden-chē-ˈa-lə-tē 

noun

confidentially adverb