A conceptual structure or entity on which something draws or depends:
the town’s economic base collapsed
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2.1A foundation or starting point for further work:
she uses existing data as the base for the study
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SYNONYMS
2.2 [WITH MODIFIER] A group of people regarded as supporting an organization, for example by buying its products:
a customer base
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3A place used as a centre of operations by the armed forces or others; a headquarters:
he headed back to base