( old-fashioned , formal ) you use to wit when you are about to be more exact about sth that you have just referred to :
Pilot error, to wit failure to follow procedures, was the cause of the accident.
( old-fashioned , formal ) you use to wit when you are about to be more exact about sth that you have just referred to :
Pilot error, to wit failure to follow procedures, was the cause of the accident.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005