If you apply as a group, the trip becomes cheaper.
He visited Japan as a member of the group.
organization; association; body
A formally structured entity such as a non-profit, labor union, or corporate body. More institutional than sense 1.
The organization aims at environmental protection.
He is active in a local volunteer organization.
The students formed a volunteer organization.
He joined a human rights organization.
We toured the sightseeing spots as a group.
団体 refers to an organized, often institutional group, whereas 一行 usually describes a temporary party of people moving or acting together for one occasion.
団体 is a broad, neutral word for any organized group (e.g., a tour group or NPO), while 組合 specifically implies members joining for mutual economic or labor interests.
団体 is a broad, neutral term for any group or organization, while ギルド specifically implies a trade or interest-based fellowship with shared craft or purpose.
group customer; party of tourists; group guest
team competition; team match