hallo
/həˈloʊ/
interjection
- Used as a greeting or to attract someone's attention.
- Hallo, is anyone there?
- Hallo, how are you today?
- She waved and called out, 'Hallo!'
noun
- A cry or shout used to greet someone or get their attention.
- Her hallo echoed through the empty hallway.
- He gave a loud hallo across the field.
- I heard a friendly hallo from behind me.