investigation
Americannoun
-
investigations
plural
-
the act or process of investigating or the condition of being investigated.
- Synonyms:
- exploration, scrutiny
-
a searching inquiry for ascertaining facts; detailed or careful examination.
- Synonyms:
- exploration, scrutiny
noun
Usage
What does investigation mean? An investigation is a thorough search for facts, especially those that are hidden or need to be sorted out in a complex situation. The goal of an investigation is usually to determine how or why something happened. Investigations are usually formal and official. The word is commonly associated with police investigations of criminal activity, but it is used in many other contexts to refer to the process of investigating—systematically finding and examining evidence. Example: After a six-month investigation, this news organization uncovered widespread corruption.
Synonym Usage
Investigation, examination, inquiry, research express the idea of an active effort to find out something. An investigation is a systematic, minute, and thorough attempt to learn the facts about something complex or hidden; it is often formal and official: an investigation of a bank failure. An examination is an orderly attempt to obtain information about or to make a test of something, often something presented for observation: a physical examination. An inquiry is an investigation made by asking questions rather than by inspection, or by study of available evidence: an inquiry into a proposed bond issue. Research is careful and sustained investigation.
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of investigation
First recorded in 1400–50; late Middle English investigacio(u)n from Latin investīgātiōn- (stem of investīgātiō ). See investigate, -ion
Explanation
If something has gone missing, conduct an investigation to find it. To do this, seek out details associated with its disappearance, asking questions and gathering evidence in order to find out what happened to it. If you watch a lot of detective shows, it won’t surprise you to learn that the noun investigation traces back to the Latin words in-, meaning “into,” and vestigium, meaning “footprint, track.” An investigation may not always involve people looking for footprints at a crime scene, but that methodical gathering of details and other evidence associated with a crime or wrongdoing is at the heart of any investigation.
Vocabulary lists containing investigation
Florida EOC Biology 1
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Edge: Academic Vocabulary
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Miranda v. Arizona (1966): Syllabus
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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.
See Examples For:
He then looked to join an airline that would fly to Israel and sought to be put on FlyDubai’s route between Dubai and Tel Aviv, the people briefed on the investigation said.
From The Wall Street Journal ● Oct. 7, 2026
“The investigation remains active and ongoing, and this preliminary assessment should not be interpreted as a final determination of the circumstances surrounding his death,” the department said.
From Los Angeles Times ● Oct. 7, 2026
During the investigation, details emerged about the club watching training sessions involving Oxford and Ipswich, in addition to filming Middlesbrough as they prepared for the first leg of their play-off semi-final.
From BBC ● Oct. 7, 2026
The successful results in human tissue strengthen the case for further investigation and could eventually lead to clinical trials in people with neurodegenerative diseases or traumatic brain injury.
From Science Daily ● Oct. 7, 2026
To be honest, I don’t have a lot of faith in Sheriff Ocasek’s investigation.
From "Linked" by Gordon Korman
Police have opened 18 internal investigations into allegations of misconduct since the protests began, Nunez said.
From Barron's ● Oct. 7, 2026
Trade policy tends to arrive in public dressed in abstraction: percentages, agreements, investigations, duties, markets.
From Salon ● Oct. 7, 2026
Data storage company Snowflake told the BBC its investigations had "found no compromise" of its platform.
From BBC ● Oct. 6, 2026
The video from Alhambra that Fields said she was told prompted Trump to demand investigations, and which Padilla shared, was posted to TikTok by the League of United Latin American Citizens on Feb. 26, 2025.
From Los Angeles Times ● Oct. 6, 2026
—After 1 got out of the hospital, and after all the police investigations, and 1 found out that I had to go to court, I was really scared.
From "Tears of a Tiger" by Sharon M. Draper
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
