(put on special clothes to appear particularly appealing and attractive; "She never dresses up, even when she goes to the opera"; "The young girls were all fancied up for the party")
(make something appear superficially attractive; "The researcher tried to dress up the uninteresting data"; "Don't try to dress up the unpleasant truth")
(put a caparison on; "caparison the horses for the festive occasion")
(dress in a costume; "We dressed up for Halloween as pumpkins")
(dress in a certain manner; "She dresses in the latest Paris fashion"; "he dressed up in a suit and tie")
(dressed in fancy or formal clothing)