Definition of hello exclamation from the Oxford Advanced Learner's Dictionary. used as a greeting when you meet somebody, in an email, when you answer the phone or when you want to attract somebody’s attention. Hello John, how are you? Hello, is there anybody there? Say hello to Liz for me. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.