hello/he'ləʊ, hə'- $ -'loʊ/

int. used as a greeting when you see or meet sb, or when you start a telephone conversation

int. [表示打招呼、问候或唤起注意] 喂；你好：Hello, Peter! How are you? 喂，皮特！你还好吗？

◇Hello, may I speak to Lisa? 喂，我可以和莉萨通电话吗？

say hello to sb 向…问好：Bill, come and say hello to John. 比尔，过来向约翰问好。

用法Hello! Hi! 是熟人、朋友之间非正式问候或打招呼的用语。对方的回答一般也是对应的Hello!或Hi! How do you do? 只是在初次见面时说的问候语，对方的回答也是说How do you do? How are you?是熟人、朋友之间的问候语，回答常为Fine, thank you.