|Origin:||hollo a shout to call attention (16-19 centuries)|
hel‧lo S1 also hallo, hullo British English [countable]
used as a greeting when you see or meet someone:
Hello, John! How are you?
Stanley, come and say hello to your nephew.
Well, hello there! I haven't seen you for ages.
used when answering the telephone or starting a telephone conversation:
Hello - may I speak to Anne?
used when calling to get someone's attention:
Hello! Is there anybody home?
used when you think someone is not acting sensibly or has said something stupid:
You didn't remember her birthday? Hello!
5 British English
used to show that you are surprised or confused by something:
Hello! What's happened here?
to have a quick conversation with someone:
Promise you'll look in and say hello when you have time.