In public is a common phrase used to describe activities or behaviors that occur in plain view of others. However, there are many different ways to convey this concept using alternative expressions. For example, one might say "out in the open," "in view of others," "publicly," or "with an audience." Each of these phrases serves to communicate the idea of visibility and the presence of people around, but may carry slightly different connotations depending on the context. Other possible synonyms might include "amidst a crowd," "in a public space," or "before witnesses." Ultimately, the choice of phrasing will depend on the specific situation and the desired tone of the message.