If you describe spoken comments or pieces of music as unheard, you mean that most people are not familiar with them because they have not been expressed or performed in public. a country where social criticism was largely unheard until this year
disapproval If you say that a person or their words go unheard, you are expressing criticism because someone refuses to pay attention to what is said or take it into consideration. His impassioned pleas went unheard
Not granted an audience or a hearing; not allowed to speak; not having made a defense, or stated one's side of a question; disregarded; unheeded; as, to condem&?; a man unheard
If someone's words or cries go unheard, nobody can hear them, or a particular person cannot hear them. Martin's weak cries for help went unheard until 6.40pm yesterday. not heard or listened to
You can say that an event or situation is unheard of when it never happens. Meals are taken communally with other guests in the dining-room. Private bathrooms and toilets are unheard of It's almost unheard of in France for a top politician not to come from the social elite
You can say that an event or situation is unheard of when it happens for the first time and is very surprising or shocking. Mom announced that she was going to visit her family for a couple of weeks, which was absolutely unheard of. something that is unheard of is so unusual that it has not happened or been known before