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basis

noun [C] uk   /ˈbeɪ.sɪs/ ( plural bases   /-siːz/   ) us  

basis noun [C] (IMPORTANT FACTS)

C1 the most important facts, ideas, etc. from which something is developed: This document will form the basis for our discussion. Their proposals have no proven scientific basis. Decisions were often made on the basis of (= using) incorrect information.
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basis noun [C] (METHOD)

B2 a way or method of doing something: Most of our staff work for us on a voluntary basis (= they work without being paid).
(Definition of basis from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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