dressed-up \dressed-up\ adj. attired in fancy or formal clothing. [Narrower terms: dressed to kill(predicate)]

Syn: dressed to the nines(predicate), dolled up, spruced up, spiffed up. [WordNet 1.5]

Source: The Collaborative International Dictionary of English v.0.48
 

dressed-up adj : dressed in fancy or formal clothing [syn: dressed(p), dressed to the nines(p), dressed to kill(p), dolled up, spruced up, spiffed up, togged up]

Source: WordNet (r) 2.0