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main reason

/meɪn ˈriːzən/ · main ˌriːzən
noun
  1. The primary cause or explanation for something. The main reason for the delay was a technical issue.
noun
  1. The most important or significant factor in a situation. Her main reason for quitting the job was the lack of opportunities for growth.
noun
  1. The primary motivation or purpose behind an action or decision. The main reason for starting the business was to create a sustainable income stream.
Did you know? The phrase 'main reason' is often used in formal or professional contexts to convey a sense of importance or significance.
Written by Lexi Wordsworth, Dictionary Editor 1 lookups Added Aug 9, 2026