hello
• hi! (used in greeting); hey! (used to attract attention)
• greeting, salutation
• you say `hello' when you are greeting someone or starting a telephone conversation. can also be used as a count noun. e.g. do come over and say hello to the group.
hello everyone
• hi all, hi to every person
first hello
• first time saying hello, initial greeting
saying hello
• act of greeting one with the word "hello"