This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Large in extent, range, or amount.

adj. Of or relating to the cultivation of vast areas of land with a minimum of labor or expense.

adj. In the nature of an extent, wide, widespread.

adj. Having wide extent; of much superficial extent; expanded; large; broad; wide; comprehensive

adj. Capable of being extended.

That may be extended or spread out; extensible.

Having considerable extent; wide; large; embracing a wide area or a great number of objects; diffusive: as, an extensive farm; an extensive sphere of operations; extensive benevolence.

Pertaining to or characterized by extension in space or in any quantity; having extent or extension.

Pertaining to logical extension.

Logical extension.

In agriculture, noting that method of farming or husbandry in which relatively small crops or returns of any kind are taken from large areas with a minimum of labor and expense.

adj. of agriculture; increasing productivity by using large areas with minimal outlay and labor

adj. broad in scope or content

adj. large in spatial extent or range or scope or quantity

"The American Petroleum Institute has been running what it termed an "extensive" TV, radio and print advertising campaign."

comprehensive    big    large   

extensive energy    extensive distinctness    extensive completeness    extensive quantity    extensive sublimity    extensive proposition    extensive feeling    intensive   

extent    extend   

expanded    large    broad    wide    comprehensive    widespread    far-reaching    nationwide    statewide    widen   

apprehensive    comprehensive    counteroffensive    defensive    expensive    hypertensive    inexpensive    inoffensive    intensive    offensive   

vast    various    considerable    comprehensive