:to be aware of the existence of (someone or something):to know about (someone or something)听说;得知
He's supposed to be a famous actor, but this is the first time I've ever (even) heard of him. [=the first time I have heard his name]他应该是一位著名演员,可这是我头一次听说他。
I've never heard of such a thing!我从未听说有这样的事!
If I hear of a job opening, I'll let you know.如果我得知有职位空缺,我会告诉你。