Hello
From the Simple English Wikipedia, the free encyclopedia that anyone can change
Hello is a word used as a greeting in English. It is used to welcome somebody. When people want to be less formal, they simply say "Hi". There are also many other ways of saying "Hello", like a wave of the hand, a salute, a bow and a handshake (or a secret handshake if you are friends). Hello is a sign of politeness, though it can be said in a moody way, or a normal way.
Hello is also used by many people when they are answering a phone call. Sometimes, people can say "Good morning" in the morning or noon, and "Good evening" in the evening. "Hello Mark" is an example of greeting with hello.
Some more versions of the word "hello" include; Hi, What's up?, Hiya, Hey, Yo, G'day, Y'alright, 'Yello there are also many more.