Dictionary-enhanced plural guide
What is the Plural of “Basis”?
Learn the singular and plural noun forms, the rule behind the plural, and examples that show the form in context.
Singular and Plural Form of Basis
Basis is the singular noun form. Bases is the plural form.
Dictionary meaning: The main reason, principle, or foundation that something is built or decided on.
Why is the Plural of Basis “bases”?
The Irregular Plural Rule for Basis
This noun has an irregular plural form that does not follow standard English pluralization rules.
Plural pattern: irregular.
How to Remember the Plural of Basis
“basis” → “bases” is an irregular plural — there is no rule, so memorise the pair as a whole. Try writing it in 3 sentences today.
A common slip-up: Sometimes mispronounced as /ˈbæsɪs/ with short A instead of long A /ˈbeɪsɪs/..
Singular vs Plural Examples with Basis
See basis and bases used in real sentences side by side.
- Trust is the basis of a good friendship. B1
- The study forms the basis for new government policy. B2
- On a daily basis, she walks to work. B1
Common Plural Mistakes with Basis
Wrong: The bases of the argument is weak.
Correct: The bases of the argument are weak.
Plural noun 'bases' requires plural verb 'are', not singular 'is'.
How to Pronounce Basis and Bases
Two syllables: BAY-sis. Stress on first syllable. The 'sis' ending sounds like 'sis'.
Other Words With the Same Plural Pattern as Basis
These nouns follow the same irregular rule. Click any word to see its plural page.
A young boy or girl who is not yet an adult.
the two parts at the bottom of your legs that touch the…
A tiny insect that lives around food and moves very fast.
One of two equal parts that make up something complete.
A grown-up male person. A man is an adult male, not a…
The ability to remember things from the past, or the thought you…
One human; a single individual.
Money that a person earns from their job, paid regularly by their…
Origin and Etymology of Basis
From Greek 'basis', meaning step or pedestal; related to base.
Frequently Asked Questions About the Plural of Basis
What is the plural of “basis”?
The plural of “basis” is “bases”.
Is “bases” regular or irregular?
This page classifies it as irregular based on the available plural data.