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English definition of “secondary”

secondary

adjective (COMING AFTER)    /ˈsek.ən.dri/ US  /-der.i/
developing from something similar that existed earlier: The drug is not very effective against AIDS, though it may be used to treat secondary viral infections. You can't just rely on secondary sources for your research into her life history - you ought to look at primary sources such as her letters and diaries.Before, after and alreadyAfter and behind
(Definition of secondary adjective (COMING AFTER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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