Meaning of the word "a question mark hang over something" in English

What does "a question mark hang over something" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a question mark hang over something

US /ə ˈkwes.tʃən mɑːrk hæŋ ˈoʊ.vər ˈsʌm.θɪŋ/
UK /ə ˈkwes.tʃən mɑːrk hæŋ ˈoʊ.vər ˈsʌm.θɪŋ/
"a question mark hang over something" picture

Idiom

1.

a feeling of doubt or uncertainty about something

Example:
A question mark hangs over the future of the company.
His involvement in the scandal still has a question mark hanging over it.
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