also hallo, hullo
(~s)
Frequency: The word is one of the 3000 most common words in English.
1.
You say ‘Hello’ to someone when you meet them.
Hello, Trish...
Do you want to pop your head in and say hallo to my girlfriend?
CONVENTION formulae
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Hello is also a noun.
The salesperson greeted me with a warm ~.
N-COUNT
2.
You say ‘Hello’ to someone at the beginning of a telephone conversation, either when you answer the phone or before you give your name or say why you are phoning.
A moment later, Cohen picked up the phone. ‘Hello?’
CONVENTION formulae
3.
You can call ‘~’ to attract someone’s attention.
Very softly, she called out: ‘Hallo? Who’s there?’
CONVENTION