on one's honor

== English == === Alternative forms === upon one's honor, on one's honour (UK) === Prepositional phrase === on one's honor (US) used to emphasize that one is behaving or going to behave in a trustworthy manner. (dated) expected to do what one has promised, expected to uphold one's promise. ==== Further reading ==== “on one’s honor”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present. “on ones honor”, in Collins English Dictionary, 2011–present. “on one’s honour”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022. “be on your honour”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present. “on your honour” in Longman Dictionary of Contemporary English, Longman.