What is the meaning of dress up?

verb

• Put on special clothes to appear particularly appealing and attractive.
  • usage: "She never dresses up, even when she goes to the opera"; "The young girls were all fancied up for the party"
  • synonyms: overdress, fig out, fig up, deck up, gussy up, fancy up, trick up, deck out, trick out, prink, attire, get up, rig out, tog up, tog out
• Make something appear superficially attractive.
  • usage: "The researcher tried to dress up the uninteresting data"; "Don't try to dress up the unpleasant truth"
  • synonyms: window-dress
• Put a caparison on.
  • usage: "caparison the horses for the festive occasion"
  • synonyms: caparison, bard, barde
• Dress in a costume.
  • usage: "We dressed up for Halloween as pumpkins"
  • synonyms: costume
• Dress in a certain manner.
  • usage: "She dresses in the latest Paris fashion"; "he dressed up in a suit and tie"
  • synonyms: dress