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The definition of hello

5 Definitions of: hello

    1. sentence substitute, an expression of greeting used on meeting a person or at the start of a telephone call
    2. sentence substitute, a call used to attract attention
    3. sentence substitute, an expression of surprise
    4. sentence substitute, an expression used to indicate that the speaker thinks his or her listener is naive or slow to realize something
    5. noun, the act of saying or calling ``hello''
    6. Show me some examples of this word: hello
    7. Show me the etymology of the word: hello
Synonyms: hi (informal), greeting, good morning, welcome, kia ora (N.Z.)
 

From Collins

©HarperCollins 2008. Collins English Dictionary definition of hello