dress up

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”

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”