The phrase "is on the air" can be replaced with a variety of synonyms, depending on the context. For instance, in radio and television broadcasting, the term "live" is often used to indicate that a program is currently being broadcasted. Other synonyms include "airing," "broadcasting," "streaming," and "telecasting." Collectively, these terms allude to the fact that a message is being transmitted through electronic means and received by an audience. The usage of these synonyms varies depending on the medium of communication and the level of formality required. Regardless of the terminology used, the primary purpose is to communicate that a program or message is currently being shared with an audience.