From Longman Dictionary of Contemporary Englishbe sobe soTRUEto be true or correct ‘It belongs to my father.’ ‘Is that so?’ Morton says his parents kicked him out, but his brothers say this isn’t so. → so
Examples from the Corpus
Is that so• You stated earlier that you saw the defendant on May 31. Is that so?• The more that companies support athletes, the less sportsmen will have to rely on the state. Is that so bad? 