To Come Together
To Gather, To Be Gathered
intransitive verb, godan verb
I bet you remember 集める which means "to collect." This is similar to that, except you're not doing the action of collecting, it's just happening. Instead of "to collect" it's to come together. You can remember this because a herd of Marus (the cat) will come together into one place if they sense a box there.
The reading is the same as 集める so if you know that word you'll know how to read this word as well.
北海道への旅行で全社員が集まる予定です。
The plan is that all employees will come together on a trip to Hokkaido.
クラウドファンディングで、こんなにたくさんのお金が集まりました。
A lot of money was raised through crowdfunding.
見て！あそこにヤンキーたちがたくさん集まってるよ。
Look! A group of miscreants are gathering over there!