1Every person belonging to a certain group or organization; can also be used adverbially as "全員で" ("all together").
クラスの全員が今回のテストに合格した。
Everyone in the class passed this test.
会議には部署の全員が出席する予定だ。
All members of the department are scheduled to attend the meeting.
旅行の最終日、全員で記念写真を撮った。
On the last day of the trip, we all took a commemorative photo together.
全員が意見を出し合って、ようやく計画がまとまった。
Everyone shared their opinions, and the plan finally came together.