Introduction vs. Greeting

Introduction and Greeting Definitions
Introduction
The act or process of introducing or the state of being introduced.
Greeting
A word or gesture of welcome or salutation.
Introduction
A means, such as a personal letter, of presenting one person to another.
Greeting
A conventional phrase used to start a letter or conversation or otherwise to acknowledge a person's arrival or presence.
It's polite to begin a letter with a greeting, but this practice is less common in email.
Introduction
Something recently introduced; an innovation
"He loathed a fork.
It is a modern introduction which has still scarcely reached common people" (D.H. Lawrence).
Greeting
(uncountable) The action of the verb to greet.
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Introduction
A preface, as to a book.
Greeting
Present participle of greet
Introduction
(Music) A short preliminary passage in a larger movement or work.
Greeting
Expression of kindness or joy; salutation at meeting; a compliment from one absent.
Write to him . . . gentle adieus and greetings.
Introduction
A basic introductory text or course of study.
Greeting
(usually plural) an acknowledgment or expression of good will (especially on meeting)
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Introduction
The act or process of introducing.
The introduction of a new product into the market
Introduction
A means, such as a personal letter, of presenting one person to another.
David was feeling groggy at his introduction to Sophie, and didn't remember her name.
Introduction
An initial section of a book or article, which introduces the subject material.
This book features a preface by a well-known botanist, and an introduction by the author's mentor at university.
Introduction
A written or oral explanation of what constitutes the basis of an issue.
Introduction
The act of introducing, or bringing to notice.
Introduction
The act of formally making persons known to each other; a presentation or making known of one person to another by name; as, the introduction of one stranger to another.
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Introduction
That part of a book or discourse which introduces or leads the way to the main subject, or part; preliminary; matter; preface; proem; exordium.
Introduction
A formal and elaborate preliminary treatise; specifically, a treatise introductory to other treatises, or to a course of study; a guide; as, an introduction to English literature.
Introduction
The first section of a communication
Introduction
The act of beginning something new;
They looked forward to the debut of their new product line
Introduction
Formally making a person known to another or to the public
Introduction
A basic or elementary instructional text
Introduction
A new proposal;
They resisted the introduction of impractical alternatives
Introduction
The act of putting one thing into another
Introduction
The act of starting something for the first time; introducing something new;
She looked forward to her initiation as an adult
The foundation of a new scientific society
He regards the fork as a modern introduction