Meaning of the word "question mark" in English

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

question mark

US /ˈkwes.tʃən ˌmɑːrk/
UK /ˈkwes.tʃən ˌmɑːrk/
"question mark" picture

Noun

1.

a punctuation mark (?) indicating an interrogative expression or question

Example:
Always end a direct question with a question mark.
He wrote a sentence with a missing question mark.
2.

a matter of doubt or uncertainty

Example:
His future with the company is a big question mark.
The success of the new project remains a question mark.
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