Gang (noun)

1. An organized group of criminals.
2. A group of friends or associates who spend time together.
3. A group of people working together; a team.
4. A group of people working together to accomplish a task.
5. A group of animals living and working together.

Origin:

Middle english, from old english gange way, group; akin to old high german gang group, old english gān to go.

Examples:

1. The police have been trying to break up the gang.
2. He joined a gang when he was young.
3. The gang of friends went to the movies together.
4. The construction gang worked together to build the house.
5. The ants form a gang to protect their colony.