Definition of say-so noun from the Oxford Advanced Learner's Dictionary

 

say-so

 noun
noun
BrE
 
; NAmE
 
[singular](informal)
 
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  • permission that somebody gives to do something Nothing could be done without her say-so. He has the final say-so on these matters (= the right to make decisions).
  • Idioms based on a statement that somebody makes without giving any proof He hired and fired people on his partner's say-so.
    See the Oxford Advanced American Dictionary entry: say-so