n (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
interj. 嘿, 哈, 哈哈
1. I saw her at the park, and I said, "Ha! It's good to see you!"
我在公园见到她，我说：“哈！见到你真好！”
2. He made a funny joke, and everyone laughed, "Ha ha!"
他讲了一个有趣的笑话，大家都笑了，“哈哈！”
3. "Ha! I finally found my keys!" she exclaimed.
“哈！我终于找到了我的钥匙！”她惊呼道。