Prom (noun)

1. A formal dance or ball usually held by high school or college students.
2. A similar event or party held by other organizations or groups.

Origin:

Short form of promenade, from the latin promenāre, from pro- ("forward") + ambulāre ("to walk").

Examples:

1. She was looking forward to the prom all year.
2. He asked her to the prom as their first official date.
3. The prom was held in a grand ballroom.
4. The theme for the prom was enchanted forest.
5. The prom was a great opportunity for students to dress up and have fun.