0 an instruction to do something, or permission given by someone to do something:
She's not allowed to do anything without her father's say-so.
2 authority or approval to do something:
A coach’s responsibility is to have the final say-so on any subject.
I make the decisions and have the final say-so, it rests with me.
Most of the convictions to which we adhere are dependent for their justification on our taking something to be true on the say-so of others.
He was charged on the say-so of a cab driver.
Existing difficulties could be greatly increased, but that again emphasises the lack of an authority with the overall say-so in these matters.
Obviously he did not come back on his own say-so.
What could be more democratically respectable than for the people of that unhappy land to have the say-so in their own future?
It was purely on his say-so that we were told that 72 was the best age.
There ought to be an examination now in relation to the right to take children out of the jurisdiction on the say-so of one parent.