Climax (noun)

1. The highest point of tension, excitement, or development in a story, play, or other work of art.
2. The most intense or critical point in a series of events or experiences.
3. The point in a sexual encounter at which orgasm occurs.

Origin:

Derived from the greek word 'klimax', meaning 'ladder, staircase'.

Examples:

1. The climax of the movie was when the hero saved the day.
2. The climax of the trip was the hot air balloon ride over the Grand Canyon.
3. The climax of the novel was when the protagonist discovered the truth.
4. The climax of the speech was the powerful call to action.
5. The climax of the dance performance was the intricate, acrobatic finale.