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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:

The revelation inspired a small genre of internet consumer detective work.

From Salon ● Oct. 3, 2026

Saavedra, a former detective and federal task force officer, admitted in his plea agreement that his company began providing security to Iza around August 2021.

From Los Angeles Times ● Sep. 28, 2026

She’s got no formal training as a detective, but it’s her rich understanding of character and psychology gained from a lifetime of observing people that allows her to solve things.

From The Wall Street Journal ● Sep. 22, 2026

An ex-police detective who led the initial investigation into grooming gangs in Oxford agrees.

From BBC ● Sep. 21, 2026

"It's not easy being a detective, Daddy," Nancy said that night at dinner.

From "Sleepover Sleuths: Nancy Drew and the Clue Crew, #1" by Carolyn Keene

The girl was reported missing at about 23:20 BST on Sunday and she was later found in the park near the cricket ground in Elmley Castle, near Evesham, detectives said.

From BBC ● Oct. 5, 2026

Several gasps and sobs erupted from some of the victims’ relatives as the verdict was read, and they later shared hugs with prosecutors and detectives on the case in a courthouse hallway.

From Los Angeles Times ● Oct. 2, 2026

The next day, detectives went to the job of the man who reported the snake and spoke to him for several hours.

From Los Angeles Times ● Oct. 1, 2026

No doubt the TikTok amateur detectives would’ve momentarily shifted from true crime to the Chaplin twins, trying their damnedest to debunk what only the sisters could truly understand.

From Salon ● Sep. 28, 2026

Yet from the outset the fascination with private detectives was mixed with aversion.

From "Killers of the Flower Moon" by David Grann

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