all together; everyone turning out
Used when all members of a group participate or appear together, often in phrases like 総出で or 総出の.
The whole family turned out to clean the garden.
村人総出で祭りの準備を進めている。
All the villagers are working together to prepare for the festival.
Compound of 総 (all, whole) and 出 (going out, appearing). The exact historical derivation is uncertain, but the meaning is transparent from its components.