Prom/prɑːm/ Definition 1 of 3Pro Tip 1/3Cultural Event Prom is a significant social event in American and Canadian culture, often seen in movies and TV shows. They recreated a prom scene in the movie. Pro Tip 2/3High Expectations Prom can carry high expectations for students, sometimes leading to pressure about attire and dates. He stressed over asking someone to prom. Pro Tip 3/3Dress Code Prom usually has a strict dress code; formal wear is expected. She wore a long gown to the prom.