Meaning of 出合頭会 in Japanese

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Definition of 出合頭会

え(e) 【会】

(n) gathering (esp. Buddhist, festive, etc.)
この会に出席している他の代表者に直接話すのではなく、どうか議長に話して下さい。
Kindly address yourself to the chairman, not directly to other representatives at this meeting.

かい(kai) 【会】

であいがしら(deaigashira) 【出合い頭 ·出会い頭 ·出合頭】

(n-adv, n-t) in passing another; the moment two persons or objects meet
わたしが前をよく見てなかったから、出会い頭にぶつかっちゃって。小川くんは悪くないわ。
Because I wasn't looking where I was going, I bumped into him when we passed. It wasn't his fault.