All Members, All Hands, Everyone, Everybody
noun
All members means all members. This is also a fancy way to say everybody.
ぜんいん
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.
バンドメンバーの全員が男です。
All of the band members are men.
トーフグの社員は、全員がベーコンソムリエのテストを受けることになりました。
They decided that every Tofugu employee will take the bacon sommelier exam.
うちは家族全員で一緒に食事します。
We have meals together as a whole family.