Final answer:
An aside is a comment made to the audience that the other characters are not supposed to hear in a play.
Step-by-step explanation:
In a play, a comment made to the audience that the other characters within the play are not supposed to hear is called a aside. It is a dramatic technique used by playwrights to reveal a character's inner thoughts, opinions, or feelings directly to the audience. This allows the audience to have a deeper understanding of the character, while the other characters on stage remain unaware of the comment.