/dres"up'/ , adj.
1. being an occasion, situation, etc., for which one must be somewhat formally well-dressed: the first dress-up dance of the season.
n.
2. Informal. Usually, dress-ups .
a. a person's best clothes: Wear your dress-ups for the reception.
b. accessories or other added features: a car with custom dress-ups.
[ 1665-75; n., adj. use of v. phrase dress up ]