What is Utter Barrister?

Legal Definition
English law, Those barristers who plead without the bar, and are distinguished from benchers, or those who have been readers and who are allowed to plead within the bar, as the king's counsel are. The same as ouster barrister. See Barrister. civil law. A woman lawfully married.
-- Bouviers Law Dictionary
Legal Definition
In English law. Those barristers who plead without the bar, and are distinguished from benchers or those who have been readers, and who are allowed to plead within the bar, as the king's counsel are, Cowell.
-- Black's Law Dictionary
Legal Definition
Same as Outer barrister.
-- Ballentine's Law Dictionary