a.
1. (感到)高興的;樂意的[F][(+at/about)][+to-v][+that]
I am happy to accept your invitation.
我很高興接受你的邀請。
2. 滿足的;滿意的[F][(+about/with)]
He won't be happy with the result.
他對結果不會滿意。
3. 幸運的;幸福的[B]
Their marriage has been a very happy one.
他們的婚姻非常美滿。
4. (言行等)恰當的;巧妙的
A happy thought struck her.
她突然想到一個好主意。 5. (用於祝詞)快樂的[B]
Happy birthday to you!