The plural of syllabus is either syllabuses or syllabi. Both forms are correct in modern English and refer to more than one course Have you ever paused while writing and wondered whether the plural of syllabus is syllabi or syllabuses? You’re not alone. This small grammar question can be surprisingly confusing, especially when you want your writing to sound clear and correct.
I want to make this simple for you. In this guide, you’ll discover the correct plural forms of syllabus, understand why both syllabi and syllabuses are used, and learn how to choose the right form for different situations.
You don’t need to memorize complicated grammar rules to get it right. With clear examples, practical explanations, and a few easy tips, you’ll feel more confident using the plural of syllabus in school assignments, academic writing, and everyday communication.
What’s the Difference Between Syllabuses and Syllabi?
The main difference is how each plural form is created. The meaning stays the same.
| Form | Example |
| Singular: syllabus | The professor updated the syllabus. |
| Plural: syllabuses | The department revised its syllabuses. |
| Plural: syllabi | Students compared the course syllabi. |
Syllabuses adds the regular English ending -es. Syllabi uses a traditional plural pattern associated with Latin-derived words.
Neither form is inherently more correct or more formal than the other. Your choice can depend on your writing style, audience, or institution’s preferences.
Why Does Syllabus Have Two Plural Forms?
English has borrowed words from several languages, and some borrowed words retain alternative plural patterns. Syllabus is one example.
The ending -es creates the regular English plural syllabuses. The form syllabi reflects a traditional Latin-style pluralization.
However, this doesn’t mean every English word ending in -us must change to -i. English plural forms vary from word to word, and some nouns accept more than one option.
For syllabus, both forms are established in modern English. You can check a reputable dictionary, such as Merriam-Webster, for a reference on its meaning and usage.
Examples of Syllabuses and Syllabi in Sentences
Both plural forms work in the same contexts. These examples show how to use them naturally.
Examples with syllabuses
- The school published the syllabuses for all its courses.
- Our department reviewed several syllabuses before approving the curriculum.
- Teachers submitted their syllabuses before the new term started.
- The college updated its science and mathematics syllabuses.
Examples with syllabi
- The professor uploaded the course syllabi to the student portal.
- Students compared the syllabi to plan their class schedules.
- The university requires instructors to submit their syllabi for review.
- We checked the syllabi to understand each course’s grading policy.
In each example, the plural refers to multiple course outlines. You can generally replace syllabuses with syllabi, or vice versa, without changing the intended meaning.
What Does Syllabus Mean?
A syllabus is a document that outlines the content, requirements, and expectations of a course or academic subject.
It commonly includes:
- Topics covered during the course
- Required books and learning materials
- Assignment and examination dates
- Grading criteria
- Attendance requirements and course policies
For example, a biology syllabus might list the units students will study, the laboratory work they’ll complete, and the dates of major exams.
When you’re talking about several courses, use either plural form. One course has a syllabus; five courses may have five syllabuses or five syllabi.
Common Mistakes When Using the Plural of Syllabus
The main mistake is assuming that only one plural form is correct. A few other errors are easy to avoid.
Mistake 1: Treating syllabi as the only correct plural
Incorrect claim: Syllabi is the only grammatically correct form.
Correct explanation: Both syllabi and syllabuses are accepted in modern English.
Mistake 2: Assuming syllabuses is incorrect
Syllabuses is a standard English plural, not an informal or incorrect alternative.
Correct: The department revised its syllabuses for the coming academic year.
Mistake 3: Using the singular form for multiple documents
Incorrect: The professor uploaded all the syllabus.
Correct: The professor uploaded all the syllabuses.
You could also write, “The professor uploaded all the syllabi.”
Mistake 4: Switching between forms without a reason
Using both forms in the same document isn’t necessarily a grammar error. However, choosing one and using it consistently makes your writing easier to follow.
Frequently Asked Questions
What is the correct plural of syllabus?
Both syllabuses and syllabi are correct. The first follows the regular English plural pattern, while the second follows a traditional Latin-style pattern.
Is syllabi grammatically correct?
Yes. Syllabi is an accepted plural form of syllabus and is widely used in academic contexts.
Is syllabuses a real word?
Yes. Syllabuses is a standard English plural used in schools, universities, and general writing.
What is the singular of syllabi?
The singular of syllabi is syllabus.
- Singular: The professor updated the syllabus.
- Plural: The professor updated the syllabi.
Which is better: syllabi or syllabuses?
Neither form is universally better. Both are correct. Choose the one that fits your preferred style, and follow any guidance provided by your school, university, or publisher.
What is the plural of syllabus in American English?
Both syllabuses and syllabi are used in American English. Either form is acceptable, so your choice can come down to personal preference or house style.
Can I use syllabuses in formal writing?
Yes. Syllabuses is suitable for formal writing, academic documents, professional correspondence, and school communications.
Final Answer: Syllabus, Syllabuses, or Syllabi?
The plural of syllabus is syllabuses or syllabi. Both forms are grammatically correct and refer to more than one course outline.
Choose syllabuses for the regular English plural or syllabi if you prefer the traditional alternative. Either works in academic and everyday writing.
Remember the simple rule: one syllabus, two or more syllabuses or syllabi.
I am Olivia Brown, a professional English editor and grammar writer who believes that great writing begins with a strong foundation in grammar. I have spent years creating educational resources that help students and professionals improve their writing, avoid common errors, and communicate more effectively. I strive to provide clear explanations and practical examples that make grammar easy to understand and apply.
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