1. 令人愉快的；使人高兴的
Something that is joyful causes happiness and pleasure.
e.g. Giving birth to a child is both painful and joyful...
生小孩是件既痛苦又令人高兴的事。
e.g. A wedding is a joyful celebration of love.
婚礼就是快乐的爱情庆典。
2. 高兴的；快乐的；欣喜的
Someone who is joyful is extremely happy.
e.g. We're a very joyful people; we're very musical people and we love music.
我们是非常快乐的民族；我们能歌善舞，热爱音乐。