Acting as one; unitedly; everyone coming together and cooperating as a single unit.
チームは一丸となって勝利を目指した。
The team unitedly aimed for victory.
会社全体が一丸となって新製品の発売に取り組んでいる。
The whole company is working together as one on the new product launch.
災害時には住民が一丸となって復旧作業を進めた。
In the disaster, residents worked together as one to carry out restoration work.