а. начинать путешествие (for/on); The children were always excited to start off on a camping trip; б. начинать говорить; The chairman started off by attacking the first speaker.
START OFF
Англо-русский перевод START OFF
Мюллер. English-Russian Muller's dictionary bed edition. Англо-Русский словарь Мюллера редакция bed. 2012