Meaning of the word "open to question" in English

What does "open to question" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

open to question

US /ˈoʊpən tə ˈkwɛstʃən/
UK /ˈəʊpən tə ˈkwɛstʃən/

Idiom

uncertain or debatable; not definitely established or decided

Example:
Whether the new policy will actually improve things is still open to question.
His honesty is open to question after his recent actions.