Depending on the contexts or subjects in sentence, these are some possibilities.

Meaning: spreading over a large area; large in spatial extent or range or scope or quantity.

E.g. "extended farm lands".

Meaning: great in amount, number, or degree.

E.g. "a large city; "a large family".

Related signs: BIG, LARGE.

Meaning: comprehensive; far-reaching or thorough; involving a lot of details and information.

E.g.: "an extensive knowledge of Deaf studies", "linguists have conducted research into the linguistics of sign language.

Meaning: Of great extent; wide; broad; covering a large area; having a great range.

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