If you describe something as uncharacteristic of someone, you mean that it is not typical of them. It was uncharacteristic of her father to disappear like this. an uncharacteristic lack of modesty. typical, characteristic + uncharacteristically un·char·ac·ter·is·ti·cal·ly Owen has been uncharacteristically silent Uncharacteristically for Keegan, he decided to have a snooze. not typical of someone or something and therefore surprising uncharacteristic of