Intro vs Introduction: What’s the Difference?

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Intro vs introduction trips people up because the two words overlap almost completely. Both can name the opening part of a book, a speech or a song. The real difference is tone: intro is casual shorthand, while introduction is the full, formal word.

What does intro mean?

Intro is an informal noun meaning an introduction. Dictionary.com records it as a shortening of introduction that first appeared between 1895 and 1900, and it also lists a musical sense: the opening passage of a piece for a jazz or dance band.

Today, intro shows up most in music, video, podcasts and everyday talk. The plural is intros.

• The piano intro makes the whole song.
• Skip the intro and go straight to the recipe.
• Thanks for the intro to your manager.

What does introduction mean?

Introduction is the standard noun for something that introduces, or for the act of introducing. Merriam-Webster lists several senses, including the part of a book that comes before the main portion, the act of introducing something, and a short musical opening. The word has been in English since the 14th century.

• The introduction of the essay states the thesis.
• Let me make an introduction between you two.
• The introduction of electric trams changed the city.

Is intro a real word?

Yes, intro is a real word. Major dictionaries list it as an informal noun, so you can use it in casual writing without worry.

Intro is also a separate prefix from Latin meaning “inward” or “within,” as in introvert and introspection. Dictionaries sometimes use “intro.” with a period as an abbreviation for introduction or introductory, so you may see it in catalogs and reference books.

Intro vs Introduction: Which Should You Use?

Use introduction in formal writing and intro in casual writing. The right choice depends on who is reading.

Choose “introduction” for: academic essays, reports, theses, business proposals, section headings and official documents. A heading that reads “Introduction” looks polished and expected.

Choose “intro” for: song and video openings, podcasts, friendly emails, chat messages, blog posts with a relaxed voice and beginner course titles such as “Intro to Biology.”

When you mean the act of bringing in something new, such as a law, product or technology, introduction is the natural word. Intro leans toward the opening section of something or a first meeting.

How can you remember which one to use?

Ask who is reading. Friends and casual audiences get the short word, and formal readers get the full one. The memory tricks below make it easy to recall.

Common mistakes with intro vs introduction

• ✗ I’m taking Introduction Psychology.
  ✓ I’m taking Intro to Psychology.
• ✗ The company announced the intro of a new policy.
  ✓ The company announced the introduction of a new policy.
• ✗ She is an intro-vert.
  ✓ She is an introvert.
• ✗ The introduction of the song is my favorite part.
  ✓ The intro of the song is my favorite part.

Memory tricks

• Short word, short setting. The clipped word intro belongs in relaxed settings. The full word belongs in formal ones.
• Heading test. If it would sit as a section title in a formal paper, write Introduction in full.
• Inward clue. The prefix intro- means inward, so think of introvert and introspection.

Frequently asked questions

Is intro short for introduction?

Yes. Intro is an informal shortening of introduction, first recorded between 1895 and 1900 and now listed in major dictionaries.

Can I use intro in formal writing?

It is better to write introduction in formal writing such as academic papers, reports and headings. Intro suits casual writing, emails to colleagues, blog posts and conversation.

What is the plural of intro?

The plural of intro is intros.

Should I say intro to or intro of?

Use intro to when you mean a first look at a subject, as in Intro to Psychology. For the act of bringing in something new, use introduction of, as in the introduction of a new policy.

Does intro have other meanings?

Yes. Intro- is also a prefix meaning inward or within, as in introvert and introspection.

Conclusion

The intro vs introduction question comes down to tone. Intro is the friendly short form, and introduction is the formal full word that never goes out of place. Share this with someone who mixes these up.