Quick answer: Use alumnus for one male graduate, alumna for one female graduate, alumni for a group of male or mixed-gender graduates, and alumnae for a group of female graduates. In casual conversation, “alumni” often works as a catch-all plural, but formal writing demands precision.
These Latin-derived terms trip up even seasoned writers because they follow grammatical gender rules that English largely abandoned centuries ago. I’ve corrected this exact mistake in hundreds of university brochures, LinkedIn bios, and reunion invitations. Getting it right matters—it signals attention to detail and respect for academic tradition.
| Term | Meaning / When to use | Example sentence |
|---|---|---|
| Alumnus | One male graduate or former student | “My brother is an alumnus of Stanford’s engineering program.” |
| Alumna | One female graduate or former student | “She became the first alumna to donate $1 million to her sorority.” |
| Alumni | Multiple male graduates OR a mixed-gender group | “The alumni gathered for homecoming weekend.” |
| Alumnae | Multiple female graduates only | “The sorority’s alumnae organized a mentorship program.” |
When to use alumnus
Use alumnus when you’re referring to a single male who attended and graduated from a school, college, or university. This is the masculine singular form, and it’s non-negotiable in formal contexts.
“alumnus” specifically denotes one male graduate, and using it correctly demonstrates precision in professional and academic writing.
Here are real examples I’ve edited:
Wrong: “John is a proud alumni of MIT.”
Right: “John is a proud alumnus of MIT.”
Wrong: “As an alumni, he donated to the scholarship fund.”
Right: “As an alumnus, he donated to the scholarship fund.”
Wrong: “Each alumnus were asked to update their contact information.”
Right: “Each alumnus was asked to update their contact information.”
Notice that “alumnus” takes singular verbs: “he is,” “she was,” “it has.” I see this error constantly in cover letters where candidates write “I am an alumni” when they mean “I am an alumnus.” That single mistake can undermine an otherwise strong application.
When to use alumna
Use alumna when referring to a single female graduate. This is the feminine singular form, and like “alumnus,” it requires singular verb agreement.
Grammarly’s guide to commonly confused words emphasizes that “alumna” is specifically for one woman who graduated from an institution, and mixing it up with the plural forms is a frequent error in professional correspondence.
Real-world corrections I’ve made:
Wrong: “Maria is a distinguished alumni of Harvard Law.”
Right: “Maria is a distinguished alumna of Harvard Law.”
Wrong: “As a recent alumni, she joined the young professionals network.”
Right: “As a recent alumna, she joined the young professionals network.”
Wrong: “Every alumna are required to register for the event.”
Right: “Every alumna is required to register for the event.”
I once edited a wedding toast where the best man referred to the bride as “a proud alumni” of her university. Changing it to “alumna” took two seconds but elevated the entire speech. These details matter when you’re honoring someone’s achievements.
When to use alumni
Use alumni when referring to multiple male graduates or a mixed-gender group of graduates. This is the plural form that most people encounter daily, and it’s the safest choice when you’re addressing a general group.
The University of Wisconsin’s editorial style guide notes that “alumni” serves as the standard plural for groups of any gender composition, making it the default choice for most institutional communications. For more, see Alumni vs. alumnus vs. alumna vs. alumnae – what’s the ….
Examples from my editing work:
Wrong: “The alumna are planning their 10-year reunion.”
Right: “The alumni are planning their 10-year reunion.”
Wrong: “We have over 50,000 alumnus worldwide.”
Right: “We have over 50,000 alumni worldwide.”
Wrong: “All alumni is invited to the gala.”
Right: “All alumni are invited to the gala.”
Here’s a concrete scenario: You’re writing a LinkedIn headline. Instead of “Proud alumni of UCLA,” write “Proud alumnus of UCLA” if you’re male, or “Proud alumna of UCLA” if you’re female. But if you’re describing the entire UCLA graduate community in a company bio, “alumni” is correct: “Our team includes alumni from top universities worldwide.”
When to use alumnae
Use alumnae exclusively when referring to multiple female graduates. This is the feminine plural form, pronounced “al-UM-nee” or “al-UM-nye,” and it’s reserved for all-female groups.
Roanoke College’s communications resources clarify that “alumnae” should only be used when every member of the group is female, such as graduates of a women’s college or a specific sorority class.
Real examples:
Wrong: “The alumni of Smith College gathered for their reunion.”
Right: “The alumnae of Smith College gathered for their reunion.”
Wrong: “She stayed connected with her fellow alumni from Wellesley.”
Right: “She stayed connected with her fellow alumnae from Wellesley.”
Wrong: “Over 200 alumna was in attendance.”
Right: “Over 200 alumnae were in attendance.”
I recently edited a brochure for a women’s leadership conference where the organizers had written “inviting all alumni” when they specifically meant graduates of a women’s university. Changing it to “alumnae” honored the institution’s identity and showed linguistic precision.
How to remember the difference
Here’s the memory trick I teach every junior editor: Look at the ending.
- -us = one guy (alumnus)
- -a = one girl (alumna)
- -i = many guys or mixed group (alumni)
- -ae = many girls (alumnae)
Think of it this way: Latin masculine singular nouns often end in “-us” (like “focus” becoming “foci” in plural), and feminine singular nouns often end in “-a” (like “formula” becoming “formulae”). The pattern holds here.
Another trick: Alumnae has an “e”—and so does “females.” That extra letter signals the all-female plural group.
For the plural forms, remember that alumni is your default catch-all when you’re unsure or when the group is mixed. It’s the most commonly used form in everyday English, which is why people mistakenly apply it to singular cases.
Here’s a practical editor’s insight: When proofreading, circle every instance of these words and ask: “Is this one person or many? Male, female, or mixed?” That three-second check catches 90% of errors.
Common mistakes and exceptions
Mistake #1: Using “alumni” as singular
This is the most common error I encounter. People hear “alumni” so frequently that they assume it’s the standard term for any graduate. It’s not. “Alumni” is always plural.
Wrong: “I’m a proud alumni of Northwestern.” Right: “I’m a proud alumnus of Northwestern.” (if male) Right: “I’m a proud alumna of Northwestern.” (if female) For more, see Alumni, Alumnus, Alumnae: Definition, Meaning & Usage.
Mistake #2: Using “alumni” for all-female groups
When writing about graduates of women’s colleges like Barnard, Wellesley, or Smith, or all-female sorority classes, use “alumnae,” not “alumni.”
Wrong: “The alumni of Mount Holyoke organized a fundraiser.” Right: “The alumnae of Mount Holyoke organized a fundraiser.”
Mistake #3: Mixing singular and plural verbs
“Alumnus” and “alumna” are singular and take singular verbs. “Alumni” and “alumnae” are plural and take plural verbs.
Wrong: “Each alumni are required to register.” Right: “Each alumnus is required to register.”
Wrong: “The alumnae is hosting an event.” Right: “The alumnae are hosting an event.”
Exception: Informal usage
In casual conversation, text messages, or social media, many people use “alumni” as a gender-neutral singular term. While this is increasingly common, it remains incorrect in formal writing, resumes, official bios, and institutional communications. If you’re submitting a grant application or publishing a book, use the correct form.
US vs. UK differences
There’s no meaningful difference between American and British English here—these are Latin terms used consistently across English-speaking countries. However, British institutions sometimes prefer “old boy” or “old girl” in informal contexts, though “alumnus/alumna” remains standard in formal writing.
The “alum” shortcut
In very informal contexts, especially in American English, you might see “alum” used as a gender-neutral singular or plural. While dictionaries now recognize this, it’s still too casual for professional writing. Save it for text messages and casual conversation, not your LinkedIn profile.
Frequently Asked Questions
Is “alumni” singular or plural?
“Alumni” is always plural. It refers to multiple male graduates or a mixed-gender group. If you’re talking about one person, use “alumnus” (male) or “alumna” (female).
Can I use “alumni” to refer to a single person?
No, not in formal writing. “Alumni” is strictly plural. Using it for one person is grammatically incorrect, even though you’ll hear it in casual speech. In professional contexts like resumes, bios, or official communications, always use “alumnus” or “alumna” for individuals.
What’s the difference between “alumni” and “alumnae”?
“Alumni” refers to a group of male graduates or a mixed-gender group, while “alumnae” refers exclusively to a group of female graduates. If even one male is in the group, use “alumni.”
How do you pronounce “alumnae”?
“Alumnae” is pronounced either “al-UM-nee” (most common in American English) or “al-UM-nye” (traditional Latin pronunciation). Both are acceptable, though the “-nee” ending is more widely used in everyday speech.
Kimberly Sanchez holds a Bachelor’s degree in Linguistics from UCLA and has spent over a decade working as a language consultant and educator. Her journey in the world of words began with a curiosity about how language shapes our perception of the world. With a keen eye for detail and a knack for making complex concepts accessible, Kimberly specializes in the nuances of English word comparisons and their real-world implications. She joined WordCompareHub to share her insights on frequently confused words and to promote a deeper understanding of language accuracy. Kimberly writes content that is both enlightening and practical, aimed at readers who seek to enhance their communication skills. Outside of her professional pursuits, she is an avid reader and enjoys exploring multilingual environments to observe linguistic diversity in action.