evening party; soirée
A formal or semi-formal social gathering held in the evening. Often implies a somewhat elegant or Western-style event.
I was invited to an evening party held at the embassy.
彼女は夜会に着ていくドレスを選んでいる。
She is choosing a dress to wear to the soirée.
evening hairdo; evening party hairstyle
Compound of 夜 (night) and 会 (gathering). The reading is on'yomi, suggesting a Sino-Japanese origin.