1. to associate or form a friendship with someone, especially when it is considered inappropriate
Usage: often used in military or professional contexts
2. to be friendly and sociable with others
Usage: general usage

Examples

• Officers are not supposed to fraternize with enlisted soldiers.
• The manager was fired for fraternizing with subordinates.
• Students from different schools began to fraternize during the exchange program.
• The prisoners were forbidden to fraternize with the guards.
• She enjoyed fraternizing with her colleagues after work.
• The diplomat was careful not to fraternize too closely with foreign agents.