Hi, The meaning of hi is unknown, It is mean as a means of a proper greeting.
"HI, How are you?"
"Hey, good. You?"
"Hoi. Leave me alone."
"We weren't even talking to you."
There is no fucking way you dont know what hi means you must be a autistic kid if you dont know what it means its a gesture of greeting or get attention from someone dumb ass
to say hi, is to greet someone. DUUH
person 1: *see u*
Person 2: Hi *Waves* and *Smiles*
Person 1: *Awkardly smiles and waves*