extensively
Americanadverb
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so as to cover a wide range or area; broadly.
He reads and travels extensively and is regarded as one of the best-informed men anywhere.
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in a far-reaching, comprehensive way; thoroughly.
All the science departments have been extensively renovated, with new tutorial rooms and well-equipped laboratories.
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at great length or in great detail.
He spoke extensively about the threats his daughter faces as a transgender individual.
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to a great degree or in great amounts or numbers; a lot.
Although the river is used extensively by boaters, no official map has been developed to show the best places to dock, things to see, and hazards to avoid.
Other Word Forms
Etymology
Origin of extensively
Explanation
Something that happens extensively occurs in a wide or broad way — on a large scale or across a large area. When a hurricane extensively affects a state, the damage is spread over many miles. You might decide to extensively edit your anthropology paper after reading the one your friend wrote, or brag that your band will be touring extensively this summer, covering the entire Midwest. In either case, your effort is on a large scale. Extensively comes from the adjective extensive, and both words are rooted in the Latin extendere, "stretch out," from ex, "out," and tendere, "to stretch."
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.
One expert said it’s possible that the delay in the rollout of the order could stem from the administration not consulting more extensively with AI companies.
From MarketWatch • May 21, 2026
Two of the vessel's hantavirus victims -- a married Dutch couple -- had traveled extensively in Argentina for four months, with forays into Chile and Uruguay.
From Barron's • May 19, 2026
The judgement as to how far a victim can also be termed an accomplice is nuanced, says Bridgette Carr, professor of clinical law at Michigan University, who has worked extensively with victims of human trafficking.
From BBC • May 19, 2026
Those using AI most extensively were the most bullish, according to Strada Education Foundation, which surveyed about 1,500 employers.
From The Wall Street Journal • May 19, 2026
The ambassador and his aides conduct foreign policy from the newly opened, extensively barricaded embassy on Neustadtische Kirchstrasse.
From "Middlesex: A Novel" by Jeffrey Eugenides
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.
