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.
Similarly, Korte, who has reported extensively on the war with Iran, defended the newspaper’s role following her dismissal.
From Salon ● Aug. 22, 2026
Brazel said the BMW was "extensively damaged" and that when the motorist "pulled back the deployed airbag he expected to find the driver dead", instead he found Dangerfield chatting on his phone.
From BBC ● Aug. 19, 2026
In 2010, they reportedly spent $28 million to extensively renovate the estate, which boasts 310 feet of private shoreline and a private boathouse.
From MarketWatch ● Aug. 10, 2026
As noted during the hearing, these peptides have not been studied extensively and their possible health risks are unknown.
From The Wall Street Journal ● Jul. 31, 2026
Since its homeland includes the Fertile Crescent, the cradle of Western civilization and animal domestication, ancient peoples must have experimented extensively with onagers.
From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond
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.
