question mark

Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary

ˈquestion mark BrE AmE noun [countable]
1. the mark (?) that is used at the end of a question
2. there is a question mark over something/a question mark hangs over something used to say that there is a possibility that something will not be successful or will not continue to exist:
A big question mark hangs over the company’s future.

q\\question+markhu

question mark
A question mark lets you know that a sentence is a question.