What does "dress up" mean?
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Wear formal or elaborate clothes, as in
I love to dress up for a party. [Late 1600s] For the antonym, see
dress down, def. 2.
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Put on a costume of some kind, as in The children love dressing up as witches and goblins. [Late 1800s]
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Adorn or disguise something in order to make it more interesting or appealing. For example, She has a way of dressing up her account with fanciful details. [Late 1600s]
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