How do you use "以内" in a sentence?

Here's an example: "一週間以内に連絡します。"

What does "以内" mean in English?

"以内" means "within" in English. It is a noun in Japanese.

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Name: Language Island
Author: SwiftSpark, LLC

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noun

English

within

Practice "以内" with spaced repetition and native audio in the Language Island app.