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 act of making a product available for sale for the first time
the act of presenting something for discussion or consideration
the act of bringing something (such as a plant or animal) to a place for the first time
[count] :a statement made to an audience about someone who is about to speak, perform, etc., or something that is about to begin
A person who needs no introduction is well-known to the audience.
[count] the beginning part of a book, essay, speech, etc., that explains what will follow in the main part
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
[singular] :a person's first experience with something - + to
[count] :something that is added or introduced to something else