extensive
/ɪkˈstɛnsɪv/
adjective
Britannica Dictionary definition of EXTENSIVE
[more extensive; most extensive]
:
large in size or amount
:
very full or complete
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an extensive [=comprehensive] reading list
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He's had extensive [=considerable] training in this area.
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The storm caused extensive damage.
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extensive repairs
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an extensive series of tests
— extensiveness
noun
[noncount]