The word "rapture" itself does not appear in the Bible. The concept of the rapture, as it is understood today, is primarily based on a specific interpretation of 1 Thessalonians 4:16-17, which describes believers being "caught up" to meet the Lord in the air.
The key word from that passage that is often associated with the rapture is the Greek word "harpazo" (ἁρπάζω). This word means "to snatch away," "to seize," "to catch up," or "to take by force."
Therefore, while the word "rapture" isn't explicitly in the Bible, the *concept* is drawn from the interpretation of scriptures like 1 Thessalonians 4:16-17, where the Greek word "harpazo" is used.