Plural of Bison
“Bison” is invariant in ordinary number marking. One animal is “a bison,” and more than one are “bison.” Number is shown by determiners, quantities, context, and agreement rather than by adding -s.
The plural of “bison” is “bison”: singular and plural have the same form.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| one animal | a bison / one bison | Singular. |
| more than one | bison | Same-form plural. |
Quick tests
Plural-choice test
Are you referring to more than one bison?
If yes: Use “bison,” with plural context or agreement.
If no: Use “a bison” or another singular construction.
Caveat: Because the noun is invariant, surrounding words carry the number information.
Examples
One bison stood near the road.
Singular number is shown by “one.”
Several bison crossed the valley.
Plural keeps the same noun form.
The bison are moving north.
Plural agreement shows the number.
Further guidance
Core difference
Use “bison” for both singular and plural.
Fast Test
Look to quantity and surrounding grammar to identify number.
Usage Boundary
Do not add -s for the ordinary animal plural.
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.
- BISON Definition & Meaning - Merriam-Webster (opens in a new tab)Merriam-Webster · Merriam-Webster records bison as the plural of bison.