Climax, a Greek term meaning “ladder”, is that particular point in a narrative at which the conflict or tension hits the highest point.
Climax is a structural part of a plot and is at times referred to as a crisis. It is a decisive moment or a turning point in a storyline at which the rising action turns around into a falling action. Thus, a climax is the point at which a conflict or crisis reaches its peak that calls for a resolution or denouement (conclusion). In a five-act play, the climax is close to the conclusion of act 3. Later in the 19th century, the five-act plays were replaced by three-act plays and the climax was placed close to the conclusion or at the end of the play.