Select the most appropriate meaning of the given idiom.

Call on

visit

The most appropriate meaning of the idiom "call on" is visit. It is an informal expression that means to visit someone, especially for a formal or social reason. The idiom is thought to have originated in the 17th century, and it is believed to be a reference to the fact that people used to call on each other's homes to make announcements or requests.

The other options for the meaning of the idiom are incorrect. Stepping out does not mean to visit someone. Telephoning someone does not mean to visit them. Announcing something does not mean to visit someone.