As a Verb or Adjective:
1. To learn about news or some information because someone tells you about it or you learn about it from the television. English = hear of, hear about.
2. To know about something already because you have been told about it, or it has been mentioned on the television. English = have heard of, (be) informed of, (be) told of.
3. To be aware of sounds because they reach your ear. English = hear.