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Synonyms

detective

American  
[dih-tek-tiv] / dɪˈtɛk tɪv /

noun

  • detectives
    plural
  1. a member of the police force or a private investigator whose function is to obtain information and evidence, as of offenses against the law.


adjective

  1. of or relating to detection or detectives.

    a detective story.

  2. serving to detect; detecting.

    various detective devices.

detective British  
/ dɪˈtɛktɪv /

noun

    1. a police officer who investigates crimes

    2. See private detective

    3. ( as modifier )

      a detective story

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. used in or serving for detection

  2. serving to detect

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of detective

First recorded in 1830–40; detect + -ive

Explanation

Whether it's a police detective who investigates crimes or a private detective hired to find a missing person, a detective is someone whose job is to find out hard-to-get information. Detective comes from the Latin root detectus meaning to uncover or expose. Detectives detect, or discern and uncover the truth, the way a dog might detect an odor and uncover a bone. Sherlock Holmes, perhaps the most famous detective in fiction, used disguises, deductive reasoning and forensics to solve crimes. "When you have eliminated the impossible, whatever remains, however improbable, must be the truth," he famously said.

Keep Reading on Vocabulary.com

Vocabulary lists containing detective

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.

See Examples For:

Police initially struggled to identify suspects, as the descriptions given were generic and a detective compiled an error-ridden photo lineup, according to the center.

From Los Angeles Times Aug. 22, 2026

Bautista also appeared in 2021's Dune and its 2024 sequel, James Bond film Spectre, Army of the Dead and Knives Out detective thriller Glass Onion.

From BBC Aug. 21, 2026

A former Las Vegas homicide detective told the jury earlier this week that no witnesses had been able to identify the shooter.

From BBC Aug. 21, 2026

She could write and she wrote a great deal, including detective fiction, a gothic thriller “of devilry, seduction, and hashish” and stories about “ghosts, suicides, and kidnapping.”

From The Wall Street Journal Aug. 14, 2026

They called themselves the Clue Crew and had a detective headquarters in Nancy's bedroom.

From "Pony Problems: Nancy Drew and the Clue Crew, #3" by Carolyn Keene

Jonathan and Juliet, who occasionally act as amateur detectives, are smitten with each other.

From The Wall Street Journal Aug. 19, 2026

According to detectives, her mother was “very much alive.”

From Los Angeles Times Aug. 13, 2026

The Metropolitan Police said detectives were working at pace to establish the full circumstances surrounding the death, and that urgent inquiries remain ongoing.

From BBC Aug. 12, 2026

On March 17, the victim’s father confronted Joseph about his actions, which he admitted to both the father and to Tontitown detectives.

From Los Angeles Times Aug. 12, 2026

In the early morning hours of April 20, in Maryland, two teams of detectives were planning a raid that would take George Atzerodt.

From "Chasing Lincoln's Killer" by James L. Swanson

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