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Synonyms

investigate

American

[in-ves-ti-geyt] / ɪnˈvɛs tɪˌgeɪt /

verb (used with object)

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)

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

Derived Forms

Conjugated Forms

Present

Past

Future

Etymology

Origin of investigate

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

Explanation

To investigate is to look into something systematically. If you don't understand how tornadoes work, for example, investigate the forces of wind and find out. Investigate still acts a lot like the word it comes from, investigationem meaning "a searching into," which came from the Latin for "to track a footprint." It's exactly what you do when you investigate. You can investigate in the name of science, which is to look into something systematically, like when you research how tornadoes work. If you investigate a person, you find out everything you can — and you might need to hire a private eye for help.

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Vocabulary lists containing investigate

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List 8

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Word Generation Science - Preparing a Scientific Investigation

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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.

"When she died I said to her, 'now love, you made me not investigate all these years and I kept my word, " Steve says.

From BBC • Jun. 10, 2026

It cost $160 for them to investigate the issue, and they said the cost of the repair would be deducted from that fee.

From MarketWatch • Jun. 10, 2026

Her husband, noticing the commotion, also went outside to investigate.

From Los Angeles Times • Jun. 9, 2026

"Today, we require Meta to restore access to WhatsApp for competing AI assistants while we investigate whether the restrictions may infringe EU competition rules," EU antitrust chief Teresa Ribera said in a statement.

From Barron's • Jun. 9, 2026

As part of this effort, White was asked by the Justice Department to investigate corruption during the first Hale trial.

From "Killers of the Flower Moon" by David Grann

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