A more thorough explanation:

Definition: A gangster is a person who is a member of a criminal gang or an organized-crime syndicate.

Example 1: Al Capone was a notorious gangster in the 1920s and 1930s. He was the leader of the Chicago Outfit, a powerful organized-crime syndicate.

Example 2: The Sinaloa Cartel is a Mexican drug cartel that operates as an organized-crime syndicate. Its members are considered to be some of the most dangerous gangsters in the world.

These examples illustrate how gangsters are involved in criminal activities as part of a group or organization. They often engage in illegal activities such as drug trafficking, extortion, and money laundering. Gangsters use violence and intimidation to maintain their power and control over their territory.