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English definition of “sustenance”

sustenance

noun [U] uk   /ˈsʌs.tɪ.nəns/ formal us  

sustenance noun [U] (FOOD)

food: During this freezing weather, the food put out by householders is the only form of sustenance that the birds have. the ability of food to provide people and animals with what they need to make them strong and healthy: A stick of celery does not provide much sustenance.

sustenance noun [U] (SUPPORT)

emotional or mental support: When her husband died, she drew sustenance from/she found sustenance in her religious beliefs.
(Definition of sustenance from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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