Feeling pleasurable or enjoyable; fun, pleasant, or delightful. A very commonly used adjective in everyday Japanese.
友だちと過ごす時間は本当に楽しい。
Time spent with friends is really enjoyable.
その映画は予想以上に楽しかった。
That movie was more enjoyable than I expected.
新しい趣味を見つけて毎日が楽しいです。
I found a new hobby and every day is fun.