basis

noun  B1
Plain meaning

the main reason, idea, or fact that something is built on

Exam-register meaning

the underlying principle, evidence, or condition used to justify a claim or decision

In context
generalThe teacher marked the project on the basis of clarity and effort.
examAdmissions should be decided on the basis of merit rather than social background.
Common collocations
on the basis oflegal basisscientific basis
Watch out
Use the article: 'on the basis of', not 'on basis of'.
Word family
base (noun/verb)basic (adjective)based (adjective/participle)
Quick check — can you use it?

The policy was criticised because it had no clear scientific  ______ .

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