afternoon meeting; afternoon gathering
A meeting or social gathering held in the afternoon. Can be used for both formal and informal occasions.
明日の昼会は午後2時から始まります。
Tomorrow's afternoon meeting starts at 2 p.m.
昼会で軽食が出るそうです。
I heard that light refreshments will be served at the afternoon gathering.
Compound of 昼 (ひる, 'afternoon') and 会 (かい, 'meeting'). The reading is a straightforward combination of the on'yomi of 会 with the kun'yomi of 昼.