To dress up; to adorn oneself with fancy clothes or accessories, often for a special occasion or to look impressive.
彼女はパーティーに行くために着飾った。
She dressed up to go to the party.
休日にはあまり着飾らず、ラフな服で過ごすことが多い。
On days off she usually doesn't dress up and wears casual clothes.
結婚式では皆が着飾っていて会場は華やかだった。
Everyone was dressed up at the wedding and the venue looked festive.