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Synonyms

investigator

British  
/ ɪnˈvɛstɪˌɡeɪtə /

noun

  1. a person who investigates, such as a private detective

"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

Explanation

Every crime novel has an investigator, someone whose job it is to discover the truth. Not all investigators solve crimes, but to be an investigator you need to work hard to figure things out. A private investigator knocks at your door. Do you let him in? He probably only wants to ask questions, because that’s what investigators do: they research. Scientists are investigators, so are police officers, and even your friend who reads lots of books about butterflies can be considered an investigator. Rooted in the Latin word vestigare, meaning “trace out,” investigators gather facts in order to trace out the whole picture.

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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.

He must also pay restitution to the victims families and give up his right to serve as a peace officer or death investigator in California.

From Los Angeles Times • Apr. 10, 2026

"The advice of the independent report investigator, and a legal advisor, was that there was no requirement to stand down the member of staff during or after the investigation," it continued.

From BBC • Apr. 10, 2026

Under growing pressure, the government appointed a special investigator to probe whether current and former soldiers should face criminal charges.

From Barron's • Apr. 7, 2026

"Until recently, while stellar rotation was thought to be part of solving this conundrum, limited computing abilities prevented us from quantitatively testing the hypothesis," says Falk Herwig, principal investigator and director of ARC.

From Science Daily • Mar. 24, 2026

“There is no hope of justice so long as these conditions are permitted to remain,” the investigator concluded.

From "Killers of the Flower Moon" by David Grann