1 to officially tell someone something, or to give them information about something
We will inform you in writing if your application has been successful.
inform someone of/about something: Please inform us of any changes in your circumstances.
inform someone (that): Parents were informed that the school was closing.
inform someone as to how/what/when etc: I haven’t been informed as to whether he’s coming or not.
be reliably informed (=have information that you are sure is correct): I’ve been reliably informed that the delivery will arrive tomorrow.
be fully informed (=be told all the details about something): The President has been fully informed of developments.
Synonyms and related words