1 : to let a person know something I informed him of the changes. 2 : to give information so as to accuse or cause suspicion He refused to inform on his friends.

What is an example of inform?

To inform is defined as to tell, give knowledge or information. An example of to inform is someone telling a friend what time they'll arrive.

What does inform on someone mean?

: to give information about the secret or criminal activity of (someone) to the police Despite pressure from the police he refused to inform on the other conspirators.