Plural of Auditorium
“Auditorium” retains both a regular English plural, “auditoriums,” and a Latin-derived plural, “auditoria.” Current dictionary evidence recognizes both, so the main editing task is consistent choice rather than declaring one universally correct.
Both “auditoriums” and “auditoria” are accepted plurals of “auditorium.” Use one form consistently unless a style or institutional convention says otherwise.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| one room/building | auditorium | Use singular. |
| more than one | auditoriums | Accepted regular plural. |
| more than one | auditoria | Accepted Latin-derived plural. |
Quick tests
Plural-choice test
Are you referring to more than one auditorium?
If yes: Use “auditoriums” or “auditoria,” consistently.
If no: Use singular “auditorium.”
Caveat: Local institutional terminology or house style may choose one form, but general dictionary evidence accepts both.
Examples
The campus has three auditoriums.
The regular plural is accepted.
The complex contains two auditoria.
The Latin-derived plural is also accepted.
The main auditorium seats 800 people.
One takes singular “auditorium.”
Further guidance
Core difference
Use either “auditoriums” or “auditoria” for more than one auditorium.
Fast Test
If the document already establishes one form, continue with it; otherwise either dictionary-supported plural works.
Usage Boundary
Do not label one accepted variant wrong without a real style or institutional rule.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- AUDITORIUM | English meaning - Cambridge Dictionary (opens in a new tab)Cambridge University Press · Cambridge gives auditoriums and auditoria as accepted plurals.