Definition of safe noun from the Oxford Advanced Learner's Dictionary

 

safe

 noun
noun
BrE BrE//seɪf//
 
; NAmE NAmE//seɪf//
 
Cost and payment
 
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a strong metal box or cupboard with a complicated lock, used for storing valuable things in, for example, money or jewellery See related entries: Cost and payment Word Origin Middle English (as an adjective): from Old French sauf, from Latin salvus ‘uninjured’. The noun is from the verb save, later assimilated to the adjectival form.
See the Oxford Advanced American Dictionary entry: safe