decorated paper parasol; figured umbrella
A traditional Japanese oil-paper umbrella with painted or printed designs, often used for sun protection or as a fashion accessory.
夏祭りで絵日傘を差している女性を見かけた。
I saw a woman holding a decorated paper parasol at the summer festival.
Compound of 絵 (e, 'picture') + 日傘 (higasa, 'parasol'). The reading ひがさ becomes がさ due to rendaku.