The words passerby, passersby and passerbyers can easily cause confusion because they all look related, but they are not equally correct. The standard English singular form is passerby, while the standard plural form is passersby. Passerbyers is not the standard plural form and should generally be avoided in formal and everyday English.
A passerby is a person who happens to be walking or traveling past a particular place. The word is formed from passer and by and its plural follows a special pattern: passerby → passersby. Understanding this unusual plural form will help you avoid a common spelling mistake.
Quick Answer
Passerby is the correct singular form and passersby is the correct plural form. Passerbyers is not standard English. Say “A passerby helped me” for one person and “Several passersby stopped to watch” for more than one person.
Why Do People Confuse These Words?
The confusion comes from the unusual plural form of passerby.
Most English nouns form their plurals by adding -s:
- passer → passers
- teacher → teachers
- student → students
However, passerby is a compound noun, and its plural is normally formed by making the main noun passer plural while keeping by unchanged:
passerby → passersby
This is similar to other compounds:
- mother-in-law → mothers-in-law
- attorney general → attorneys general
- passerby → passersby
Because people sometimes treat passerby as if it were a regular noun ending in -by, they may incorrectly create forms such as passerbyers or passerbys.
Passerby
Passerby is the standard singular noun.
It refers to one person who passes by a particular place.
Examples
- A passerby called the police.
- A passerby helped the injured man.
- One passerby noticed the missing sign.
- The passerby stopped to help.
Meaning
A passerby is simply someone who happens to be passing a particular location.
For example:
A passerby found the lost wallet.
This means one person who was passing by found the wallet.
Passersby
Passersby is the standard plural form of passerby.
It refers to two or more people who are passing by.
Examples
- Several passersby stopped to watch.
- Two passersby helped the driver.
- The noise attracted many passersby.
- Passersby gathered around the street performer.
Why Is It “Passersby”?
The word passerby is made from two parts:
passer + by
When making it plural, the noun passer becomes plural:
passer → passers
The second part remains by:
passers + by = passersby
Therefore:
passerby → passersby
Passerbyers
Passerbyers is not the standard plural of passerby.
You should generally avoid it in standard English writing.
Instead of:
Several passerbyers stopped.
Write:
Several passersby stopped.
The form passerbyers unnecessarily adds -ers to a word that already contains the noun passer.
Passerbyers vs Passersby vs Passerby: Comparison Table
| Form | Correct? | Number | Meaning |
|---|---|---|---|
| Passerby | Yes | Singular | One person passing by |
| Passersby | Yes | Plural | Two or more people passing by |
| Passerbyers | No, not standard | Intended plural | Should be replaced with passersby |
When to Use “Passerby”
Use passerby when you are talking about one person passing a place.
Examples
A passerby noticed the accident.
The passerby offered to help.
One passerby called an ambulance.
A useful test is to replace it with one person passing by.
If that meaning fits, passerby is appropriate.
When to Use “Passersby”
Use passersby when you are talking about multiple people passing a place.
Examples
Several passersby stopped to help.
The performance attracted many passersby.
Two passersby witnessed the incident.
A useful test is to replace it with people passing by.
If that meaning fits, use passersby.
When Not to Use “Passerbyers”
Avoid passerbyers when you mean multiple people who are passing by.
Instead:
❌ Five passerbyers saw the accident.
✅ Five passersby saw the accident.
The plural passersby is the standard form.
20 Examples of Passerby and Passersby
- A passerby helped the aged woman.
One person helped her. - Several passersby stopped to watch.
More than one person stopped. - A passerby called the police.
One person called. - Many passersby noticed the unusual building.
Many people noticed it. - The passerby found a wallet on the sidewalk.
One person found it. - Two passersby helped move the heavy box.
Two people helped. - A passerby heard someone calling for help.
One person heard the call. - The loud music attracted passersby.
Several people passing by were attracted. - One passerby stopped to ask for directions.
One person stopped. - Several passersby took pictures of the event.
Several people took pictures. - A passerby noticed smoke coming from the building.
One person noticed the smoke. - The street performer entertained dozens of passersby.
Many people passing by watched. - A passerby gave the child some water.
One person gave water. - The accident was witnessed by several passersby.
Several people saw it. - One passerby offered to carry the bag.
One person offered. - Passersby gathered near the entrance.
Multiple people gathered. - A passerby reported the damaged traffic sign.
One person reported it. - The display caught the attention of many passersby.
Many people noticed it. - A passerby stopped when he heard the noise.
One person stopped. - The unusual sculpture attracted many passersby.
Many people were interested in it.
Common Mistakes
Mistake 1: Using “Passerbyers” as the Plural
Incorrect:
Many passerbyers stopped.
Correct:
Many passersby stopped.
Mistake 2: Adding Only “S” to the End
You may sometimes see:
passerbys
This is also not the standard plural form.
Use:
passersby
The plural marker belongs to passer, not the final word by.
Mistake 3: Using “Passersby” for One Person
Incorrect:
A passersby helped me.
Correct:
A passerby helped me.
Use passerby after singular determiners such as:
- a
- one
- each
- every
Mistake 4: Using “Passerby” for Multiple People
Incorrect:
Several passerby stopped.
Correct:
Several passersby stopped.
Use passersby with plural words such as:
- several
- many
- two
- three
- numerous
- numerous passersby
Memory Trick
Remember this simple pattern:
ONE → PASSERBY
MANY → PASSERSBY
Think of the word as:
passer + by
For the plural:
passers + by
So:
passerby → passersby
Do not add -ers to the whole word.
American vs British English
Passerby and passersby are standard in both American and British English.
The singular form is:
passerby
The plural form is:
passersby
The spelling does not normally change between the two major varieties of English.
You may occasionally encounter alternative spellings or different stylistic choices, but passerby/passersby are the standard forms for general writing.
Similar Words
Several expressions have a similar meaning to passerby.
Pedestrian
A pedestrian is a person traveling on foot, especially in relation to roads and traffic.
A pedestrian crossed the street.
Bystander
A bystander is someone who is present at an event but is not directly involved.
A bystander called for help.
Onlooker
An onlooker is someone who watches something happening.
Several onlookers watched the performance.
Traveler
A traveler is someone who is traveling from one place to another.
The traveler stopped at the station.
Stranger
A stranger is someone you do not know.
A stranger offered directions.
These words can overlap with passerby in some situations, but they are not exact synonyms.
Final Verdict: Passerbyers or Passersby or Passerby?
The correct choice depends on whether you mean one person or more than one person.
- Passerby = one person passing by.
- Passersby = two or more people passing by.
- Passerbyers = not the standard plural form.
For example:
A passerby helped the child.
But:
Several passersby helped the child.
The safest rule is simple: passerby for singular and passersby for plural.
Frequently Asked Questions
Is “passerby” singular or plural?
Passerby is singular. It refers to one person who is passing by.
Is “passersby” correct?
Yes. Passersby is the standard plural form of passerby.
Is “passerbyers” a correct word?
Passerbyers is not the standard plural form. Use passersby instead.
Is “passerbys” correct?
In standard English, the usual plural is passersby, not passerbys.
What is the plural of passerby?
The standard plural of passerby is passersby.
Why is the plural “passersby” instead of “passerbys”?
Because passerby is a compound noun. The plural marker is added to passer, producing passersby.
Can “passerby” refer to a woman?
Yes. Passerby is gender-neutral and can refer to any person who is passing by.
Remember This
- Passerby = one person.
- Passersby = more than one person.
- Passerbyers = not standard.
- Passerbys = not the usual standard plural.
- The plural changes passer to passers, while by stays unchanged.
- Use a passerby for one person.
- Use several passersby for multiple people.
Conclusion
The correct forms are easy to remember once you understand how the compound noun works. Passerby is the singular form for one person who happens to be passing a particular place. When you are talking about more than one person, the correct plural is passersby.
Passerbyers is not the standard plural, and passerbys is also not the usual standard form. In formal writing, school assignments, articles and professional communication, use passerby for one person and passersby for multiple people.
