If someone is friendly, they behave in a pleasant, kind way, and like to be with other people.

If you are friendly with someone, you like each other and enjoy spending time together.

You can describe another country or their government as friendly when they have good relations with your own country rather than being an enemy.

In sport, a friendly is a match which is not part of a competition, and is played for entertainment or practice, often without any serious effort to win.