In grammar, a question tag is a very short clause at the end of a statement which changes the statement into a question. For example, in `She said half price, didn't she?', the words `didn't she' are a question tag. a phrase such as 'isn't it?', 'won't it?', or 'does she?' that you add to the end of a statement to make it a question or to check that someone agrees with you, as in the sentence: 'You're from Hamburg, aren't you?'