1.Adele's hit song HELLO FROM THE OTHER SIDE
2.The common American/Canadian greeting
Drake said hello to Adele and Adele said hello back.
If you must know it's a word you use to greet somebody.
Michael: Hello, what are you doing Jake?
Jake: I'm looking up the definition of hello on Urban Dictionary.
Michael: That's probably the most stupidest thing you've done today Jake.
This means the person secretly wants you to kiss them.
Hello sexy daddy!
A polite greeting word, some similar words are hi hey
Hello I'm josh
Hello josh I'm penny