Information that you have heard but do not know to be true. (Cambridge Dictionary)
Information you have heard that might or might not be true. (Cambridge Dictionary)
Rumour. (Merriam Webster)
Hearsay is information which you have been told but do not know to be true. (Collins Dictionary)
Information received from other people which cannot be substantiated; rumour. (Oxford Dictionaries)
Canadian Criminal Evidence/Hearsay.
Hearsay evidence is any statement, either written or oral, which was made out of court, but is presented in court to prove the truth of that statement. It is a type of evidence that is generally considered inadmissible.