extensive
adj. B2 Upper Intermediate Oxford US //ɪkˈstɛnsɪv// UK //ɛkstˈɛnsɪv// ex·ten·sive
adj. covering a large area or having a great amount of detail. You use this to describe something that is very wide or deep in its reach.
adj. covering a large physical area or having a broad scope and range. Often used to describe research, damage, or knowledge that is thorough and far-reaching.
The storm caused extensive damage to the roof.
The museum has an extensive collection of ancient coins from all over the world.
After an extensive search of the historical archives, the researchers finally located the original blueprints for the city's first bridge.
From late Middle English, borrowed from Late Latin extensīvus, from Latin extensus.
Usage
Typically placed before the noun it modifies; can also follow a linking verb like 'be' or 'become'.