Meaning of "afraid" in Essential American English Dictionary

afraid

adjective us /əˈfreɪd/
to be afraid (of sth)

A2 to feel fear or worry:

I’m afraid of big dogs.
They were afraid that their son would get hurt.
I’m afraid

A2 used to politely tell someone something bad or to politely disagree with someone:

I’m afraid that we can’t come to your party.

(Definition of “afraid” from the Webster's Essential Mini Dictionary © Cambridge University Press)