be onto something

be onto something (third-person singular simple present is onto something, present participle being onto something, simple past was onto something, past participle been onto something)

1. To have gained an insight that could lead to future success.

   This product could be a game changer. I think you are onto something.

• “be onto something”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “onto something”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “be onto something” (US) / “be onto something” (UK) in Macmillan English Dictionary.