int.

1. （用以打招呼或喚起注意）哈囉，你好
   Hello, Jim! How are you?

   哈囉，吉姆！你好嗎？

2. （用作打電話時的招呼語）哈囉
3. （表示驚訝等）嘿；啊

n.

1. 表示問候（或驚奇，或喚起注意時）的叫聲[C][U]
   She said hello to me when she saw me.

   她見到我時向我打招呼。

vi.

1. 喊"哈囉"

vt.

1. 向……說"哈囉"

exclam.

1. used as a greeting or to begin a telephone conversation.
2. Brit. used to express surprise or as a cry to attract someone's attention.
   ▸used informally to express sarcasm or anger.