Synonyms

investigate

American

[in-ves-ti-geyt] / ɪnˈvɛs tɪˌgeɪt /

verb (used with object)

investigated, investigating

to examine, study, or inquire into systematically; search or examine into the particulars of; examine in detail.
to search out and examine the particulars of in an attempt to learn the facts about something hidden, unique, or complex, especially in an attempt to find a motive, cause, or culprit.

The police are investigating the murder.

verb (used without object)

investigated, investigating

to make inquiry, examination, or investigation.

investigate British

/ ɪnˈvɛstɪˌɡeɪt /

verb

to inquire into (a situation or problem, esp a crime or death) thoroughly; examine systematically, esp in order to discover the truth

"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

investigable adjective
investigative adjective
investigator noun
investigatory adjective
preinvestigate verb
preinvestigator noun
quasi-investigated adjective
reinvestigate verb
uninvestigated adjective
uninvestigating adjective
uninvestigative adjective
uninvestigatory adjective
well-investigated adjective

Etymology

Origin of investigate

First recorded in 1500–10; from Latin investīgātus, past participle of investīgāre “to follow a trail, search out”; in- ², vestige, -ate ¹

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.

Cdr Helen Flanagan, head of Counter Terrorism Policing London, said: "Since this appalling attack last week, we have been working continuously to investigate and identify those responsible."

From BBC • Apr. 3, 2026

Last month, her family took legal action against the Los Angeles Unified School District, alleging that school officials failed to investigate reports of bullying, adequately supervise student interactions or implement effective safety measures.

From Los Angeles Times • Apr. 2, 2026

Police chief Chris Balmer has been tasked with leading the new initiative to help forces investigate and tackle "anti-democratic crimes".

From BBC • Apr. 2, 2026

The court can investigate this and other missile strikes in what it regards as Palestinian territory.

From The Wall Street Journal • Apr. 1, 2026

“Not necessarily. They always investigate the parents first.”

From "Summer of the Mariposas" by Guadalupe García McCall

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023