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English definition of “sanity”

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sanity

noun [U] uk   /ˈsæn.ɪ.ti/ us    /-ə.t̬i/
the state of having a healthy mind and not being mentally ill : He'd been behaving so strangely that they began to doubt/question his sanity. to keep/preserve/retain your sanity the fact of showing good judgment and understanding: The closer we got to the deadline for action, the more I questioned the sanity of the decision we had taken. Maybe Jenny can bring some sanity into this crazy situation.
(Definition of sanity from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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