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

 

sou

 noun
noun
BrE BrE//suː//
 
; NAmE NAmE//suː//
 
[singular](old-fashioned, British English, informal)
 
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if you do not have a sou, you have no money at all Word OriginFrench, originally as sous (plural), from Old French sout from Latin solidus ‘solid’.