verb (used with or without object), o·ver·dressed, o·ver·dress·ing.
Examples from the Web for overdress
There is a vulgar tendency among all Americans to overdress which you must avoid.At Boarding School with the Tucker Twins|Nell Speed
Jean Merritt wore her favorite rose color, a dress of satin with an overdress of tulle.The Ranch Girls and Their Great Adventure|Margaret Vandercook
Then, it seems to me, it is a little hard on the really poor girls at school if the rest of you are inclined to overdress.Vocational Guidance for Girls|Marguerite Stockman Dickson