extensively

American  

[ik-sten-siv-lee] / ɪkˈstɛn sɪv li /

adverb

1. 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.

2. in a far-reaching, comprehensive way; thoroughly.

   All the science departments have been extensively renovated, with new tutorial rooms and well-equipped laboratories.

3. at great length or in great detail.

   He spoke extensively about the threats his daughter faces as a transgender individual.

4. 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.

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Other Word Forms

• nonextensively adverb
• preextensively adverb

Etymology

Origin of extensively

extensive ( def. ) + -ly

Example Sentences

Lorenze and Paul will have to manage the renovations of their new abode while also balancing the tennis pro’s hectic work schedule, which requires him to travel extensively for much of the year.

From MarketWatch • Apr. 8, 2026

She was discovered in the bathroom of the apartment she was sharing with a friend, Caitlin Cash, who called 911, applied CPR and then was questioned extensively by Austin authorities.

From The Wall Street Journal • Mar. 31, 2026

Even though I research extensively and pride myself on accuracy, without direct experience things go wrong.

From Slate • Mar. 28, 2026

That man was arrested, interviewed and extensively cross-examined at McCullagh's trial.

From BBC • Mar. 23, 2026

This was a topic Toby had thought about extensively as a kid.

From "We'll Fly Away" by Bryan Bliss

Related Words

• broadly
• largely