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introduction /ˌɪntrəˈdʌkʃən/  

  • noun
    plural -tions
    [count] :the act of making a person known to others by name - usually plural
    [noncount] :the act of introducing something: such as
    the act of bringing something into practice or use for the first time
    the introduction of telephone service to the area
    the act of making a product available for sale for the first time
    Since its introduction last yearover a million copies of the software have been sold.
    the act of presenting something for discussion or consideration
    the introduction of evidence at the trial
    the introduction of a new topic for conversation
    the introduction of the bill to Congress
    She told the audienceby way of introduction, that the research was completed a year ago.
    the act of bringing something (such as a plant or animal) to a place for the first time
    the introduction of an Asian plant species to America
    [count] :a statement made to an audience about someone who is about to speak, perform, etc., or something that is about to begin
    After a brief introduction, the performer took the stage.
    A person who needs no introduction is well-known to the audience.
    Our speaker this evening needs no introduction.
    [count] the beginning part of a book, essay, speech, etc., that explains what will follow in the main part
    Did you read the introduction?
    His introduction outlined the main points of the speech.
    the beginning part of a piece of music
    [count] :something (such as a book or a course of study) that provides basic information about a subject - + to
    The book/course is an introduction to computer programming.
    [singular] :a person's first experience with something - + to
    That concert was my introduction to her music. [=it was the first time I had heard her music]
    [count] :something that is added or introduced to something else
    The plant is a recent introduction from Asia.