Hmm, I would have to disagree with "overdressed." My younger sister's graduation ceremony comes to mind. While all the other graduates wore nice clothes, most of the girls in dresses, one girl was wearing a royal purple, sequin and crystal encrusted, ball gown with a full tulle skirt that had obviously been recycled from a former prom. The skirt was enormous; her graduation gown was zipped closed over it and the result was that she generally appeared to be a giant yellow and purple sausage. Wearing a prom dress to graduation? Definitely overdressed.