A "costume contest" is a competition where people wear different outfits or costumes and are judged on how creative or well-made their costumes are. The person who has the best costume usually wins a prize or recognition. Full definition
Large pet costume contest at 11 a.m., small pets at 1 p.m., followed by trick - or - treating for pets at 30 pet - friendly businesses. (articles.orlandosentinel.com)
This fun afternoon has a photo booth, face painting, live music, and a pooch parade and canine costume contest. (bostonmamas.com)
This year, there was a dog costume contest and a Himalayan dog blessing ceremony. (petage.com)