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English definition of “secondary”

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secondary

adjective uk   /ˈsek.ən.dri/ us    /-der.i/

secondary adjective (EDUCATION)

B1 [before noun] relating to the education of children approximately between the ages of 11 and 18 years old: secondary education Marcus has just started at secondary school.
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secondary adjective (LESS IMPORTANT)

less important than related things: Her health is what matters - the cost of the treatment is of secondary importance. The need for secrecy is secondary to the need to take immediate action.

secondary adjective (COMING AFTER)

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.
secondarily
adverb uk   /ˌsek.ənˈdeə.rɪ.li/ us    /-ˈder.ɪ-/
(Definition of secondary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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