1. be frightened or apprehensive about smth.:
- Willie recounted his life of drugs and violence in remorseless terms, and said he was not afraid to die.
2. feeling regret about smth.:
- Mary did not let me send the paper at first, she kept hoping it was a mistake, but I am afraid it is too true.
be afraid, be very afraid—(imper.) is used as a humorous cliché to say that smth. unwelcome is imminent:
- The reservation staff are friendly—but be afraid, be very afraid of the restaurant staff…