investigate
verb
in·ves·ti·gate
in-ˈve-stə-ˌgāt 
investigated; investigating
: to observe or study by close examination and systematic inquiry
: to make a systematic examination
especially
: to conduct an official inquiry
Examples of investigate in a Sentence
The police are still investigating the murder.
The accident was thoroughly investigated.
The manager promised to investigate when we pointed out an error on our bill.
He was investigated for his involvement in the incident.
Recent Examples on the Web
The White House was briefly locked down as authorities investigated the incident.
—
Los Angeles Times, 5 May 2026
Victims and their families deserve to know that their case matters, that a detective is actively investigating and that every effort is being made to identify suspects, make arrests, and bring closure.
—Sierra Van Der Brug, Daily News, 4 May 2026
Neither the Hartford Police nor Connecticut State Police is investigating the matter.
—Kaitlin McCallum, Hartford Courant, 4 May 2026
The incident is being investigated by SBSD's Specialized Investigations Division - Homicide Detail.
—Dean Fioresi, CBS News, 4 May 2026
See All Example Sentences for investigate
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Los Angeles Times, 5 May 2026
Victims and their families deserve to know that their case matters, that a detective is actively investigating and that every effort is being made to identify suspects, make arrests, and bring closure.
—Sierra Van Der Brug, Daily News, 4 May 2026
Neither the Hartford Police nor Connecticut State Police is investigating the matter.
—Kaitlin McCallum, Hartford Courant, 4 May 2026
The incident is being investigated by SBSD's Specialized Investigations Division - Homicide Detail.
—Dean Fioresi, CBS News, 4 May 2026
See All Example Sentences for investigate
Cite this Entry
“Investigate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/investigate. Accessed 7 May. 2026.
Copy CitationKids Definition
investigate
verb
in·ves·ti·gate
in-ˈves-tə-ˌgāt
investigated; investigating
: to study by close examination and systematic inquiry
Etymology
from Latin investigare "to track, investigate," from in- "in, toward" and vestigium "footprint" — related to vestige
Word Origin
A detective investigating a crime may find the criminal by following clues. In much the same way, a hunter may find game by following tracks. The origins of the word investigate show how fitting it is to compare the detective to the hunter. The Latin word vestigium meant "footprint, track." Joined with the prefix in-, the noun vestigium gave rise to the verb investigare. This word meant both "to track or trace by footprints" and "to study or examine closely." Only the second meaning was kept when the verb was borrowed into English as investigate.
Legal Definition
investigate
verb
in·ves·ti·gate
in-ˈves-tə-ˌgāt
investigated; investigating
: to observe or study by close examination and systematic inquiry
specifically
: to make (a criminal suspect) the subject of inquiry and study for the purpose of establishing probable cause
: to make a systematic examination
especially
: to conduct an official inquiry
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