Convention
Tournament, Meetup, Event
noun, の adjective
When you have a big meet there's a lot of people together. Why would you have a bunch of people gather together? Probably for a convention or some kind of competition or tournament.
たいかい
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
日よう日は、サッカーの大会に出じょうします。
I am participating in the soccer tournament on Sunday.
花火大会では、アイスクリームがよく売れます。
At fireworks events, ice cream sells well.
私がマラソン大会で優勝したのは、オナラを止めることができず、他のランナーがその臭いを嗅ぐたびにペースを落としていったからだ。
I won the marathon because I couldn’t stop farting and all the other runners slowed down whenever they smelled them.